Homework Help: Math: Statistics

Recent Homework Questions About Statistics

statistics
A production process historically produces 95% items that are considered acceptable quality-wise and 5% that are defective.A sample of 50 items is taken. Determine the following probablities: Probability that exactly 47 items will be good.
Monday, September 12, 2011 at 2:01pm

basic statistics for the behavioral sciences
on a standard test of motor coordination, a sports psychologist found that the population of a average bowlers had a mean scores of 24,with a standard deviation of 6. she tested a random sample of 30 bowling alley and found a sample mean of 26, a second random sample of 30 ...
Monday, September 12, 2011 at 12:53am

Essay Check
This is an essay about the article called Rambo's of the road, could you please read it and see if I am getting there? It is supposed to be a critique. Note: This is not a spellcheck or proofread, I just want someone to read it and tell me if it is alright and makes sense...
Sunday, September 11, 2011 at 1:04pm

statistics
a sample of 120 men and women randomly divided into 3 groups with 40 people per group. group 1 members varied their workouts. group 2 performed the same exercise at each workout. group 3 had no set schedule or regulations for their workouts. by the end of the study 18 people ...
Saturday, September 10, 2011 at 7:16pm

Statistics
Given the list 10,7,5,3,-6 find by hand, mean,meadian, midrange, mode(s), range, popvar, and sample standard deviation. (seven problems)
Saturday, September 10, 2011 at 4:14pm

Statistics
Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4. There are 200 students in a sample. How many of these students will have scores that fall under the score of 41?
Friday, September 9, 2011 at 11:10pm

statistics
Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4 There are 200 students in a sample. How many of these students will have scores that fall under the score of 41?
Friday, September 9, 2011 at 11:06pm

Statistics
1. The mean and standard deviation of the grades of a group of students who took an economic exam were 69 and 7, respectively. The grades have a mound-shaped distribution. According to the Empirical Rule, a) Approximately 68% of the grades were between which...
Friday, September 9, 2011 at 9:10pm

statistics
write a data set that fits the following description. there are 7 numbers in the data set the minimum is 17 the range is 45 the median is 32 the mode is 41
Friday, September 9, 2011 at 3:50pm

basic statistics for the behavioral sciences
(a)on a normal distribution of exam scored, poindexter scored at the 10th percentile, so he claims that he outperformed 90% of his class. Why is he correct or incorrect? Because Foofy's score is in a tail of the distribution, she claims she had one of the highest scores on...
Friday, September 9, 2011 at 2:47pm

statistics
MEAN=80,SD=10, S=8, N=25 E(M)= SE(M)=
Friday, September 9, 2011 at 11:29am

Psychology Statistics
Determine whether the numerical value is a parameter or a statistic? In a phone survey of 100 random homes in a country, 21 families had garages. Is this a parameter because the data set of 100 random homes is a population? Is this a statistic, because the data set of 100 ...
Friday, September 9, 2011 at 8:27am

Statistics
A young guy is setting up a date for his girlfriend. He has the option of going to Chicago, Indianapolis, or staying in Lafayette. If he chooses Chicago, he has 10 choices for a play and 100 choices for a restaurant. If he opts of Indianapolis, he has 5 choices for a play and ...
Thursday, September 8, 2011 at 10:26am

statistics
A group of 5 patients treated with a medicine 'A' aeigh 42,3,9,48,60 and 4r kg; a second group of 7 patients from the same hospital treated with medicine 'B' weigh 38,42,56,64,68,69 and 62 kg.Do you agree with the claim that medicine 'B' increases the ...
Thursday, September 8, 2011 at 8:42am

statistics
Suppose you are given data from a survey showing the IQ of each person interviewed and the IQ of his or her mother. That is all the information you have. Your boss has asked you to put together a report showing the relationship between these two variables. What could you ...
Wednesday, September 7, 2011 at 10:39am

statistics
in a certain survey 1,043 adults, 81% reported having more than one television at home. find the actual number of respondents corresponding to the given percentage?
Tuesday, September 6, 2011 at 9:25pm

statistics
A local manufacturer employs 750 people. The pie chart below gives the breakdown within the company. Of the employees, how many are management?
Tuesday, September 6, 2011 at 6:58pm

College Statistics
The brightness of sunlight at the earth's surface changes over time depending on whether the earth's atmosphere is more or less clear. Sunlight dimmed between 1960 and 1990. After 1990, air pollution dropped in industrial countries. Did sunlight brighten? Here are data...
Tuesday, September 6, 2011 at 1:07am

Statistics
A student wonders if tall women tend to date taller men than do short women. She measures herself, her dormitory roommate, and the women in the adjoining rooms; then she measures the next man each woman dates. Here are the data (heights in inches): Men (x) 67 62.1 66.9 63.3 72...
Tuesday, September 6, 2011 at 12:58am

College statistics
Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students. The result for ...
Monday, September 5, 2011 at 10:38pm

statistics
a pouch contains 97 green beads 72 red beads and 7 yellow beads. how many blue beads should be added so that the probability of drawing a red bead is 3/10 ?
Monday, September 5, 2011 at 8:16pm

Statistics
Consider the following multiple regression results. Using a= .05 as the significance level, identify all statistically significant predictors. In a relative sense, which variable has the strongest impact? What is the interpretation of the “constant” term? Independent...
Monday, September 5, 2011 at 7:15pm

statistics
the breaking strength of a cable known to be normally distributed with a mean of 4000kg and a standard deviation of 25kg.The manufacture prefers that at least 95% of its products meet a strength requirement of 4050 kg.Is this requirement being met? If not, by changing the ...
Monday, September 5, 2011 at 1:25pm

Legal Studies
Hi beautiful people! I need help finding statistics on the rates of incarciration/fines or other punishments for person convicted of victimless crime in Australia. Preferably Queensland. This is urgent, I simply cannot find the information and I would REALLY appreciate your ...
Monday, September 5, 2011 at 6:42am

statistics
What score in a distribuiton that has a mean of 500 and a standard deviaiton of 100, would identify the top 60% of scores?
Sunday, September 4, 2011 at 9:40pm

statistics
The number of independent errors in a transmitted message of n symbols follows a Binomial distribution. The probability of an error in transmission is .001. If 2,000 symbols were sent, a) Find the expected number of errors. b) Write out the formula for the distribution of ...
Sunday, September 4, 2011 at 6:14pm

statistics
One year, professional sports players salaries averaged 1.6 million with a standard deviation of .7 million. Suppose a sample of 100 major league players was taken. Find the approximate probability that the average salary of the 100 players exceeded 1.1 million.
Sunday, September 4, 2011 at 9:50am

statistics
For any distribution (normal or not normal), the probability of selecting a score greater than the median is
Sunday, September 4, 2011 at 6:47am

statistics
the addition of 11 numbers is 66.from them the avarage of 5 numbers is 3.and the avarage of last 5 numbers is 9. what is the 6th numbers?
Saturday, September 3, 2011 at 10:54pm

statistics
david electronics had a profit of $10 million in 2002. Profit doubled from 2002 to 2003 and profit increased eight fold from 2003 to 2004. what was the annual geometric mean rate of growth from 2002 to 2004?
Saturday, September 3, 2011 at 12:57am

statistics
A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 95% confident that her estimate is correct. If the standard deviation is 4.02, how large a sample is needed to get the desired information to be accurate within 0.58 ...
Friday, September 2, 2011 at 9:48pm

statistics
A sample of 106 golfers showed that their average score on a particular golf course was 87.98 with a standard deviation of 5.39. Answer each of the following (show all work and state the final answer to at least two decimal places.): (A) Find the 90% confidence interval of the...
Friday, September 2, 2011 at 9:47pm

statistics
Given a level of confidence of 99% and a population standard deviation of 7, answer the following: (A) What other information is necessary to find the sample size (n)? (B) Find the Maximum Error of Estimate (E) if n = 74. Show all work
Friday, September 2, 2011 at 9:46pm

statistics
The diameters of apples in a certain orchard are normally distributed with a mean of 4.77 inches and a standard deviation of 0.43 inches. Show all work. (A) What percentage of the apples in this orchard is larger than 4.71 inches? (B) A random sample of 100 apples is gathered ...
Friday, September 2, 2011 at 9:42pm

statistics
5. Each year, a national achievement test is administered to 3rd graders. The test has a mean score of 100 and a standard deviation of 15. If Jane's z-score is 1.20, what was her score on the test?
Friday, September 2, 2011 at 8:19pm

statistics
If the probability of running out of gas is .03 and the probability the electronic starting system will not work is .01 a.) what is the probability there will be enough gas and that the starting system will work? assume the two events are independent b.) when may independence ...
Friday, September 2, 2011 at 1:11am

statistics
A researcher wants to select 6 participants from the following data set using systematic sampling. The 12th participant is randomly selected. x=(1,2,3,4...48) 1. Find all of the selected participants. 2. How would youre answer differ if the last participant were randomly ...
Monday, August 29, 2011 at 4:04pm

statistics
d. There are 200 students in a sample. How many of these students will have scores that fall under the score of 41? Mean=45 standard deviation=4
Monday, August 29, 2011 at 2:40pm

english
This is the question? To make supporting points it is important that one finds relevant, accurate, and reliable sources. What should you consider when looking for helpful sources? What are some red flags that indicate you should avoid a particular source? My Answer The first ...
Monday, August 29, 2011 at 1:31pm

statistics
the average marks for statistics in a class of 30 were 52. the top six students had an average of 31 marks. what were the average marks of the other students?.
Monday, August 29, 2011 at 7:29am

statistics
if I rank 338 out of a class of 540 what percentage of the class am i in
Sunday, August 28, 2011 at 5:50pm

statistics
The diameters of grapefruits in a certain orchard are normally distributed with a mean of 6.45 inches and a standard deviation of 0.45 inches. Show all work. (A) What percentage of the grapefruits in this orchard have diameters less than 7.1 inches? (B) What percentage of the ...
Sunday, August 28, 2011 at 5:03pm

basic statistics for the behavioral sciences
there are 80 students enrolled in statistics. (a)you and 11 other earned the same score. what percent of the class received your score? (b)forty percent of the class received a grade of C. how many students received a C? (c) only 7.5% of the class received a D. how many ...
Saturday, August 27, 2011 at 11:09pm

statistics
Given that the population mean is 4.85, calculate the z-scores of 3.3,3.84.4 and 6.2.
Saturday, August 27, 2011 at 4:30pm

Statistics
population mean is 6.36, calculate the z scores of 2,6,5,and 8.
Saturday, August 27, 2011 at 4:26pm

statistics
mean is 6.36, calculate the z-scores for Cases 1, 9, 14, and 20 on the variable LIKE.
Saturday, August 27, 2011 at 4:19pm

statistics
set of data is normally distributed with a mean of 200 and standard deviation of 50. · What would be the standard score for a score of 300? · What percentage of scores is between 200 and 300? · What would be the percentile rank for a score of 300? (Points...
Friday, August 26, 2011 at 10:04pm

statistics
The US Army is allowed only five test firings of the lance missile. The following figures represent number of feet the missiles missed the target by: 26, 147, 35, 63, and 51. Calculate the mean and the median. Which should the army report ?
Friday, August 26, 2011 at 5:22pm

Statistics
Transactional data can be used to partition a customer base into different ‘segments’ based on predominant purchasing patterns. Typical segments might be ‘convenience shoppers’ (customers who buy a lot of ready meals, pizzas, etc.), ‘cooking from ...
Friday, August 26, 2011 at 1:35pm

statistics
You have been approached by the editor of gentlemen's magazine to carry ot a research study. The magazine has been unsuccessful in atracting shoe manufacturers as advertisers. When the sales force tried to secure advertising from shoe manufacurers, they were told men's...
Friday, August 26, 2011 at 2:16am

statistics
The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 170 and a variance of 4. The material is considered defective if the breaking strength is less than 166 pounds. What is the probability that a single, randomly selected piece ...
Thursday, August 25, 2011 at 9:52pm

statistics
Find the range and the variance (correct to one decimal place). 78,91,93,93,99
Thursday, August 25, 2011 at 3:46pm

statistics
Find the first arithmetic mean between 100 and 135 given the following sequence: ..., 100, ___, ___, ___, ___, 135, ...
Thursday, August 25, 2011 at 2:12pm

Statistics
4. John sells ice cream bars at the local park. He buys the bars for $1.20 per dozen and sells them for $0.15 each. If it is a rainy day at the park, he can sell nothing; if is overcast, he sells one dezen bars; and if is sunny, he sells two dozen. He can return unsold bars, ...
Thursday, August 25, 2011 at 10:22am

statistics
If n = 100 and p = 0.02 in a binomial experiment, does this satisfy the rule for a normal approximation? Why or why not?
Thursday, August 25, 2011 at 10:17am

Statistics
Please help!!! 3. A one-legged, red-nosed tramp approaches John in the park and tells him he can predict the next day’s weather perfectly after he has drunk a shot of “Ripple” wine (cost of one shot: $0.50). If the tramp is telling the truth, should John engage ...
Thursday, August 25, 2011 at 7:58am

STATISTICS
WHAT PERCENTAGE OF AFRICAN AMERICAN ARE FEMALE
Wednesday, August 24, 2011 at 8:41pm

Statistics
For a particular value, this table gives the percent of scores between the mean and the z-value of a normally distributed random variable. What percent of the total population is found between the mean and the z-score, assume z = 2.79
Wednesday, August 24, 2011 at 8:15pm

statistics
A random variable x has a following probability distribution. x: 0 1 2 3 P(X=x) 1/6 1/2 1/5 2/15 How to calculate E(1/(X+1))?
Wednesday, August 24, 2011 at 7:31pm

Statistics
an automobile manufacturer claims that their tires last more than 70,000 miles before replacement? Whats the null and alternative hypothesis
Wednesday, August 24, 2011 at 5:39pm

Statistics
what does it mean for categories to overlap? does it mean that categories overlap if they have the same value? Ex: Cause : Percent weather : 40 error : 6 mech. : 12 sabotage: 6
Wednesday, August 24, 2011 at 1:02pm

statistics
A researcher is interested in studying people’s mean age in a certain region. If the population standard deviation is known to be 8 years and 1.5 year of error margin is allowed, find the minimum simple size the researcher needs to use, knowing that he is going to conduct...
Wednesday, August 24, 2011 at 12:18pm

statistics
A class roster includes 24 males students and 15 female students who are IT majors. If 4 students from the group are selected to represent IT majors at a University meeting, what is the probability 2 will be male and 2 will be female?
Tuesday, August 23, 2011 at 9:39pm

Literacy 3
Please Check my work. Thank you. 6. To avoid plagiarism in you written research paper, you must provide a citation for which of the following? A. The United Nations ruling on the Soviet-bloc countries B. The date the berlin Wall was pulled down by a crowd in Germany C. ...
Tuesday, August 23, 2011 at 8:36pm

statistics
a companys ceo wanted to estimate the percentage of defective product per shipment. in a sample contianing 600 products he found 45 defective product. a. find 99% confidence interval for the true porporton of defective product show calcultions and explain process used to ...
Tuesday, August 23, 2011 at 7:06pm

statistics
a researcher is interested in studying people's mean age in a certain region. If the population standard deviation is known to be 8 years and 1.5 year of error margin is allowed, find the minimum simple size the researcher needs to use, knowing that he is going to conduct ...
Tuesday, August 23, 2011 at 6:59pm

English
I forgot to include the following sentences,please. Thank you very much for your help. 1) However, European law says that animal testing cannot be used for beauty and cleaning products. 2) Those who support animal testing say that it is a necessary evil since it helps ...
Tuesday, August 23, 2011 at 9:09am

statistics
The mean hours of internet usage in the US is 25 hours per week. A hypothesis test is performed at a lefel of significance of .05 with a P-Value of .05 with a P-value of 0.08
Monday, August 22, 2011 at 11:35am

statistics
5.20 There are 100 males and 120 females in the graduating class of a local high school. Thirty-five percent of the graduating males are on school sports teams, as are 30% of the graduating females. A local businessperson is going to donate $1000 to the favorite charity of a ...
Sunday, August 21, 2011 at 9:16pm

statistics
4(0.4)K to the power negetive 0.6 L to the power O.6,over K)all in brackets
Sunday, August 21, 2011 at 6:36pm

statistics-varsity level
(3L to the power 0.5. Over L to the power 2)all in brackets to the power 2 outside brackets?
Sunday, August 21, 2011 at 6:31pm

statistics
The heights of American women aged 18 to 24 are normally distributed with a mean of 66 inches and a standard deviation of 2.5 inches. In order to serve in the U.S. Army, women must be between 57 inches and 79 inches tall. What percentage of women are ineligible to serve based ...
Sunday, August 21, 2011 at 4:30pm

Statistics
You are a marketing analyst in a large grocery store chain. Your job entails developing a robust customer knowledge base utilizing the company's vast database of in-store purchases. To date, you have been able to build a profile of your customer base, draw inferences about...
Sunday, August 21, 2011 at 1:47pm

Statistics
Describe the business benefits of parameter estimation. Provide examples of the type of parameters that might be of interest to decision makers in areas such as marketing.
Sunday, August 21, 2011 at 1:36pm

statistics
Suppose a chi-squared test has a degree of freedom of 10 and the level of significance is set at 0.05. What is the critical value?
Sunday, August 21, 2011 at 8:59am

statistics
A normal distribution is any distribution that is not unusual. (True/False)
Saturday, August 20, 2011 at 7:40pm

statistics
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b. Relative frequency of...
Saturday, August 20, 2011 at 7:28pm

statistics
1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. (True/False) b. The graph of a normal distribution is bell-shaped. (True/False) c. If a population has a normal distribution, the mean and the median are not ...
Saturday, August 20, 2011 at 7:26pm

Statistics
Construct the probability distribution for the value of a 2-card hand dealt from a standard deck of 52 cards (all face cards have a value of 10 and an ace has a value of 11). a) What is the probability of being dealt a hand that adds up to 21? b) What is the probability of ...
Saturday, August 20, 2011 at 5:22pm

Statistics
The notion of statistical significance is frequently used in business to distinguish between true and spurious between-group differences (such as a difference between the response rates to two different promotions). Hence, when the difference between the baseline (no ...
Saturday, August 20, 2011 at 5:07pm

statistics
Catriona buys a car costing £3500. There is a reduction of one-fifth of the price. She pays three-eights of the reduced price as deposit. How much is the deposit?
Saturday, August 20, 2011 at 2:57pm

Statistics
A new screening test for a disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% (240) and 70%, (280) respectively. Four hundred (400) people are screened at a clinic during the first year the new test is implemented. (...
Saturday, August 20, 2011 at 11:00am

statistics
Student A gets 40%maxmium marks and 10 above pass mark.Student B gets 50%maxmium marks and 50 above pass mark.find the pass mark.
Friday, August 19, 2011 at 1:00pm

Statistics
a fair dice is tossed seven times. suppose that on tosses 2 through 7, the value seen is different from the value seen on the preceding toss. Let S denote the sum of the 7 value seen, the probability that s to be even is
Friday, August 19, 2011 at 12:21pm

statistics
what type of datat must you collect for a t test and why?
Wednesday, August 17, 2011 at 9:18pm

statistics
why is the range 31.57 - 34.03 is not a good choice for class boundaries?
Wednesday, August 17, 2011 at 8:46pm

Statistics
3.The lifespan of 300 Giant turtles is found to follow a Normal distribution ~ N(70,144). (a)What is the standard error for this sample’s mean? (b) What is the probability of a turtle living more than 85 years? (c)What is the probability of a turtle living between 60 and ...
Wednesday, August 17, 2011 at 2:20pm

Statistics
A study shows that the probability of a baby being born with gene x is 0.6. The probability of a baby being born with gene y is 0.7. (a)What is the probability of being born with both genes assuming that the probabilities are independent? (b)In fact; 90% of those born with ...
Wednesday, August 17, 2011 at 2:17pm

Statistics
The turnover (in millions of pounds) for 8 train companies and 8 coach companies are given below. Train 4.3 13.2 134 88 92 66.5 122.1 102 Coach 2.2 31 44 72 19 89.3 55.9 43.1 (a)Using an appropriate statistical test determine whether train companies or coach companies have ...
Wednesday, August 17, 2011 at 2:14pm

statistics
A random variable X is best described by a continuous uniform distribution from 20 to 45 inclusive. The standard deviation of this distribution is approximately
Tuesday, August 16, 2011 at 8:46pm

statistics
For a class actvitity, your group has been assigned the task of generating a quiz question that requires use of the formuala for conditional probability to compute P(B|A). Your group comes up with the following question: "If P(A and B) = 0.40 and P(A) = 0.20, what is the ...
Tuesday, August 16, 2011 at 1:28am

statistics
a. A statistics practitioner randomly sampled 100 observations from a population with a standard deviation of 5 and found that x is 10. Estimate the population mean with 90% confidence.
Monday, August 15, 2011 at 11:00pm

statistics
a. A random sample of 25 was drawn from a normal distribution with a standard deviation of 5. The sample mean is 80. Determine the 95% confidence interval estimate of the population mean.
Monday, August 15, 2011 at 10:59pm

math
A researcher predicts that listening to music while solving math problems will make a particular brain area more active. To test this, a research participant has her brain scanned while listening to music and solving math problems, and the brain area of interest has a ...
Monday, August 15, 2011 at 7:14pm

statistics
For the following scores, find the (a) mean, (b) median, (c) sum of squared deviations, (d) variance, and (e) standard deviation: 1,112; 1,245; 1,361; 1,372; 1,472
Sunday, August 14, 2011 at 6:30pm

statistics
For the following scores, find the (a) mean, (b) median, (c) sum of squared deviations, (d) variance, and (e) standard deviation 3.0, 3.4, 2.6, 3.3, 3.5, 3.2
Sunday, August 14, 2011 at 6:29pm

statistics
A psychologist interested in political behavior measured the square footage of the desks in the official office of four U.S. governors and of four chief executive officers (CEOs) of major U.S. corporations. The figures for the governors were 44, 36, 52, and 40 square feet. The...
Sunday, August 14, 2011 at 6:28pm

statistics
two samples are considered independent if the sample selected from one population is not related to the sample selected from the second population. true or false
Sunday, August 14, 2011 at 3:55pm

statistics
I have the following homework question. I also included the work done. Please advise if I am on the right track Thank you!! "A recent study determined that the distance employees at a pharmaceutical company in New Jersey commute to work each way is normally distributed ...
Sunday, August 14, 2011 at 2:01pm

Finance
Clanton Company is financed 75 percent by equity and 25 percent by debt. If the firm expects to earn $30 million in net income next year and retain 40% of it, how large can the capital budget be before common stock must be sold?
Saturday, August 13, 2011 at 10:40pm

statistics
1. Find the mean, median, and range for each of the two data sets? 2. Find the standard deviation using the rule of thumb for each of the data sets. 3. Compare the two sets and describe what you discover. The following data sets shows the ages of the first seven presidents (...
Saturday, August 13, 2011 at 6:28pm

Statistics
Each year, approximately 160 colleges compete in the National Concrete Canoe Competition. Each team must design a seaworthy canoe froma a substance not known for its capacity to float. The canoes must weigh between 100 and 350 pounds. Find the midrange.
Friday, August 12, 2011 at 8:42pm

statistics
Set 1: 5 of 100 people died Set 2: 5 of 100 people are unhappy Which is more significant and why?
Thursday, August 11, 2011 at 8:43pm

statistics
A biologisst reports a confidence interval of (3,7,5,5) when estimating the mean height ( incentimeters) Of a sample of seedlings. The estimated margin of errors is___
Thursday, August 11, 2011 at 7:10pm

Statistics
What are the values for the mean, median, and standard 52, 43, 30, 38, 30, 42, 12, 46, 39, 37, 34, 46, 32, 18, 41, 5
Thursday, August 11, 2011 at 6:14pm

Statistics
I was just wondering if anyone had any suggestions on where I could find linear data sets to use for my statistics paper. I'm having a problem finding something that I can open or even view on my computer. I have a mac and would be using numbers to to the report.....Any ...
Thursday, August 11, 2011 at 3:10pm

STATISTICS
The number of boxes of girl scout cookies sold by each of the girl scout in a city has a distribution which is approximately normal with a mean=75 boxes and a standard deviation=30 boxes.... 1.) find the probability that scout chosen at random sold between 60 and 90 boxes. 2...
Wednesday, August 10, 2011 at 12:50pm

STATISTICS HELP!!!!!!!!!!!!
More than 200 billion grocery coupons are distributed each year for discounts exceeding $84 billion. However, according to a report in USA Today, only 3.2% of the coupons are redeemed. If a company distributes 5000 coupons, what is the probability that: (a) at least 100 ...
Wednesday, August 10, 2011 at 10:16am

College statistics
Statistical Abstracts (117th edition) reports sale price of unleaded gasoline (in cents per gallon) at the refinery. The distribution is mound-shaped with mean μ = 80.04 cents per gallon and standard deviation, σ = 4.74 cents per gallon. (a) Are we likely to get ...
Wednesday, August 10, 2011 at 9:44am

STATISTICS HELP!!!!!!!
Statistical Abstracts (117th edition) reports sale price of unleaded gasoline (in cents per gallon) at the refinery. The distribution is mound-shaped with mean μ = 80.04 cents per gallon and standard deviation, σ = 4.74 cents per gallon. (a) Are we likely to get ...
Wednesday, August 10, 2011 at 9:34am

STATISTICS HELP!!!!!!!
The probability that a person has an unlisted telephone number is 0.15. The district manager of a political action group is phoning people urging them to vote. In a district with 416 households, all households have phones. What is the probability that the district manger will ...
Wednesday, August 10, 2011 at 9:30am

statistics
More than 200 billion grocery coupons are distributed each year for discounts exceeding $84 billion. However, according to a report in USA Today, only 3.2% of the coupons are redeemed. If a company distributes 5000 coupons, what is the probability that: (a) at least 100 ...
Wednesday, August 10, 2011 at 12:23am

statistics
Statistical Abstracts (117th edition) reports sale price of unleaded gasoline (in cents per gallon) at the refinery. The distribution is mound-shaped with mean μ = 80.04 cents per gallon and standard deviation, σ = 4.74 cents per gallon. (a) Are we likely to get good...
Wednesday, August 10, 2011 at 12:20am

statistics
The probability that a person has an unlisted telephone number is 0.15. The district manager of a political action group is phoning people urging them to vote. In a district with 416 households, all households have phones. What is the probability that the district manger will ...
Wednesday, August 10, 2011 at 12:18am

statistics
Find the probability that in a group of 500 people 69 or more would have green eyes.
Tuesday, August 9, 2011 at 11:10pm

statistics
the mean marks obtained by a group of 100 students was found to 49.46.THE mean marks obtained in the same examination by another group of 200 students was 52.32. Find the mean marks obtained by the both groups of students tken together.
Tuesday, August 9, 2011 at 2:43pm

statistics
Suppose that X is in finate(6,25) determine the vale of b in P(X greater than b)=0.66
Monday, August 8, 2011 at 4:53pm

Statistics
While attending a sales meeting you were asked about the relationship between sales calls and actual sales made. Fortunately, you had just completed a study on this topic bu you failed to bring the report with you. However, you do recall that the coefficient of determination ...
Monday, August 8, 2011 at 2:48pm

statistics
27. Consider the following hypothesis test. H0: µ = 15 Ha: µ ≠ 15 A sample of 10 gives a sample mean of 8.9 and population variance of 9. Consider the following data drawn from a normally distributed population: 4, 8, 12, 11, 14, 6, 12, 8, 9, 5, α = 0.01...
Monday, August 8, 2011 at 11:16am

statistics
if 20% of the people in a community use the library in one year, find these probabilities. a) at most 3 people used the library b) exactly 3 people used the library c) at least 5 people used the library
Monday, August 8, 2011 at 8:15am

statistics
if 20% of the people in a community use the library in one year, find these probabilities
Monday, August 8, 2011 at 8:13am

statistic
1. Compute descriptive statistics for liberal art colleges and research universities in the Excel file colleges and universities. Compare the two types of colleges . what can you conclude.? 2.The Excel file MBA Student survey provides data on a sample of students social and ...
Sunday, August 7, 2011 at 11:03pm

statistics
You have hired a polling organization to take a simple random sample from a box of 200,000 tickets and estimate the percentage of 1s in the box. Unknown to them, the box contains 50% 0s and 50% 1s. How far off should you expect them to be if they draw 50,000 tickets? Answer a...
Sunday, August 7, 2011 at 11:02pm

Statistics
A severe storm has an average peak wave height of 16.4 feet for waves hitting the shore. Suppose that a storm is in progress with a severe storm class rating. Let us say that we want to set up a statistical test to see if the wave action (i.e., height) is dying down or getting...
Sunday, August 7, 2011 at 9:20pm

statistcis
Im a nurse that works in a hospital. What are some examples of Inferential statistics used in the workplace?
Sunday, August 7, 2011 at 7:52pm

statistics
The first class in a relative frequency table is 50–59 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate?
Sunday, August 7, 2011 at 10:46am

statistics
1. In a Gallup poll of 2,040 adults, 956 said that second-hand smoke is very harmful. What is the percentage of adults who said second-hand smoke is very harmful?
Sunday, August 7, 2011 at 10:40am

statistics
the average starting salary is Rs 15000per month with a standard deviation of Rs.1000 assuming normal distribution,what is the probability that starting salary will be more than Rs.17000, out of 200 degree holders how many will getRs.14000?
Sunday, August 7, 2011 at 12:41am

Basic Statistics
In the popular TV cartoon series, "The Simpsons," the Simpson family has five members: Homer, Marge, Bart, Lisa, and Maggie. Let's involve the Simpsons in Simpson's Paradox. Consider Homer and Bart's consumption of potato chips and donuts. Suppose that ...
Saturday, August 6, 2011 at 9:20pm

English
Outline of my speech on Aggressive Driving. Is this correct? Topic- Aggressive Driving Introduction •Road Rage oInjuries and deaths oIncreasing road rage oGrowing epidemic •Aggressive Driving oDefinition oTypes Verbal Road Rage Quiet Road Rage ...
Saturday, August 6, 2011 at 4:56pm

statistics
the mean height of 25 male workers in a factory is 161 cm and the mean height of 35 female workers in the same factory is 158 cm. find the combined mean of 60 workers in the factory.
Saturday, August 6, 2011 at 9:23am

Statistics
I have recently administered an employee survey at a call center. I found a Pearson r of -.66 between the employees' ages and their scores on an employee engagement scale. What does this finding represent/mean? Also, there is a relationship between gender and employee ...
Friday, August 5, 2011 at 2:58am

Math (Statistics)
Five college engineering students are choosing specialized fileds of engineering to study. Each student is allowed to select 1 field. The available fields are Electrical Engineering (EE), Mechanical Engineering (ME), and Computer Engineering (CE). If the second student does ...
Thursday, August 4, 2011 at 6:02pm

English
Here is my outline for my speech. How does it look? I know I need a better conclusion, I am just not sure exactly yet. Aggressive Driving Introduction • How many of you have turned on the news or opened a newspaper to find that another human being was seriously injured or...
Wednesday, August 3, 2011 at 11:40pm

Elementray Statistics
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 20. Would a sample mean of 115 or more be considered unusual? Why or why not?
Wednesday, August 3, 2011 at 11:29pm

statistics
A sales firm receives an average of four calls per hour on its toll-free number. For any given hour, find the probability that it will receive exactly eight calls
Wednesday, August 3, 2011 at 8:40am

statistics
Would it be unusual for the mean of a sample of 3 to be 115 or more?
Tuesday, August 2, 2011 at 10:51pm

statistics
In a preliminary study, the sample standard deviation for the duration of a particular back pain suffered by patients was 18.0 months. How large a random sample is needed to construct a 90% confidence interval so that an estimate can be made within 2 months of the actual duratio
Tuesday, August 2, 2011 at 8:59pm

Statistics(Please help)
t-test for independent means: n=8 t=-1.33 df= 8 C.V. = plus or minus 2.306 My question is how do you get 2.306 for the cv??? Why wouldnt the cv be 2.31?
Tuesday, August 2, 2011 at 3:40pm

statistics
t-test for independent means: n=8 t=-1.33 df= 8 C.V. = plus or minus 2.306 My question is how do you get 2.306 for the cv???
Tuesday, August 2, 2011 at 3:24pm

statistics
What would you guess the value of the correlation coefficient to be for the pair of variables: "number of man-hours worked" and "number of units of work completed"? a) approximately 0.9 b) approximately 0.4 c) approximately 0.0 d) approximately -0.4 e) ...
Tuesday, August 2, 2011 at 2:59pm

statistics
In a study of the relationship between self-concept and achievement, a correlation of 0.75 was found. this indicates that the relationship between these two variables is: a) weak and positive b) strong and postitive c) weak and negative Thank You!
Tuesday, August 2, 2011 at 2:55pm

Statistics
Please I Need Help With This Question Showing All Steps...Thank You :) The average number of units that the factory workers at Benzo company assemble per week is μ = 45 with a standard deviation of σ = 12. Assume that the distribution of units assembled is normal. If...
Tuesday, August 2, 2011 at 2:49pm

Statistics
Verifying Requrements and finding the margin of error Credit rating FICO credit rating scores of a smiple random sample of applicants for credit cards 95% confidence =50,x=677 and is knownd to be 68
Tuesday, August 2, 2011 at 1:06pm

statistics
The director of an inner-city hospital believes that the average cost per gunshot injury of patients admitted to the hospital’s emergency room is $18,000. A random sample of 9 gunshot injuries had a mean of $17,213 with a standard deviation of $572. Calculate the ...
Tuesday, August 2, 2011 at 1:01pm

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