Saturday
May 23, 2015

Homework Help: Math: Statistics

Recent Homework Questions About Statistics

statistics
In testing the hypotheses H0: = 0.40, H1: > 0.40 at the 5% significance level, if the sample proportion is .45, and the standard error of the sample proportion is .05, the appropriate conclusion would be
Tuesday, February 17, 2015 at 6:09pm

statistics
S) Suppose we want to determine the (binomial) probability (p) of getting 5 heads in 15 flips of a 2-sided coin. Using the Binomial table in the appendix of the text, what values of n, x, and p would we use to look up this probability, and what would be the probability? n=...
Tuesday, February 17, 2015 at 7:18am

Statistics
Approximately 6% of the male population is color blind. If a random sample of 250 male adults is tested for color blindness, what is the probability that at least 10 but no more than 20 will be color blind?
Tuesday, February 17, 2015 at 2:25am

Statistics
Can someone please separate this terms by categorical variable and numerical variable: Region Population Growth Rate Adult Literacy Measles Immunity Male Life expectancy Female life expectancy Male Healthy Average Life Expectancy Female Healthy Average Life Expectancy
Monday, February 16, 2015 at 8:24pm

statistics
From Lab 3, Problem 2 2. The data set magnet is from an experiment to see the effect of voltage and number of turns on the magnetic force of an electromagnet. The experimenters expected to see a limit to which the number of turns could increase the force. (This is actually a ...
Monday, February 16, 2015 at 4:13pm

Statistics
Anger and Snap Judgments Read the article entitled “Anger Can Cause Snap Judgments” and answer the following questions. ANGER CAN CAUSE SNAP JUDGMENTS Anger can make a normally unbiased person act with prejudice, according to a forthcoming study in the journal ...
Monday, February 16, 2015 at 4:11pm

statistics
if you earned a 17 on a quiz what would your score indicate the best performance a. x=15 and s=2.4 b. x=15 and s=2.1 c. x=17 and s=2.4 d. x=17 and s=2.1
Sunday, February 15, 2015 at 8:06pm

statistics
A teacher is interested in finding out how many hours a day a college student at Monroe Community College exercises. The teacher randomly chooses 1000 college students and asks them, “How many hours do you exercise?” Explain whether there could be any bias in the ...
Sunday, February 15, 2015 at 8:04pm

Statistics
A linear regression of price on square footage of homes for sale found the equation price = 30275 + 144*sqft. In this equation, the slope means A. a house with no square feet will cost $30,275. B. for every 144 square feet, average price goes up $30,275. C. for every square ...
Sunday, February 15, 2015 at 5:07pm

statistics
Listed below are the duration's (in hours) of a simple random sample of all flights of a space shuttle program. Find the range, variance, and standard deviation for the sample data. Is the lowest duration time unusual? Why or why not? 71, 100, 237, 199, 164, 269, 193, 379...
Friday, February 13, 2015 at 1:35am

statistics
Below are 36 sorted ages of an acting award winner. Find P10 converting a percentile to a data value 17 21 22 22 22 23 24 30 31 33 37 38 38 42 43 44 45 47 47 50 51 53 54 54 54 54 55 60 64 65 67 69 71 71 72 76 78 I am not sure how this system works and I searched my textbook ...
Friday, February 13, 2015 at 1:22am

Statistics
above average warmth extended over the east and southeast on Jan.13, 2005.The days forecasted high temperatures in four cities in the affected area were as follows: Burlington, Vt. 55 degrees F, Durham, N.C. 74 degrees F, Williamsburg, Va. 74 Degrees F., and Augusta Ga., 75 ...
Thursday, February 12, 2015 at 12:13pm

statistics
One of the tallest living men has a height of 263 cm. One of the tallest living women is 245 cm tall. Heights of men have a means of 177 cm and a standard deviation of 8 cm. Heights of women have a mean of 163 cm and a standard deviation of 4cm. Relative to the population of ...
Wednesday, February 11, 2015 at 7:24am

statistics
Listed below are the duration's (in hours) of a simple random sample of all flights of a space shuttle program. Find the range, variance, and standard deviation for the sample data. Is the lowest duration time unusual? Why or why not? 71 100 237 199 164 269 193 379 252 233...
Wednesday, February 11, 2015 at 7:15am

statistics
Identify the level of measurement of the data and explain what is wrong with the given calculation. In a set of data, movie ratings are represented as 100 for 1 star, 200 for 2 stars, and 300 for 3 stars. the average (mean) of the 527 movie ratings is 231.2 Don't get this ...
Tuesday, February 10, 2015 at 2:55pm

statistics
A polling company reported that 53% of 2302 surveyed adults said that they play basketball.a. what is the exact value that is 53% of 2302? b. could the result from part (a) be the actual number of adults who said that they play basketball? why or why not? c. What could the ...
Tuesday, February 10, 2015 at 2:42pm

Statistics
The time to fly between New York City and Chicago is normally distributed with a mean of 180 minutes and a standard deviation of 17 minutes. What is the probability that a flight is more than 200 minutes?
Tuesday, February 10, 2015 at 12:02pm

statistics
The response to a question has three alternatives: A, B, and C. A sample of 120 responses provides 52 A, 29 B, and 39 C responses. Show the frequency and relative frequency distributions (use nearest whole number for the frequency column and 2 decimal for the relative ...
Tuesday, February 10, 2015 at 9:17am

statistics
An automotive manufacturer has selected 10 car seats to study the Rockwell hardness of the seat recliner mechanism. A sample of 8 has an average of 44.795 and a standard deviation of 0.402. At 95% percent confidence level, what is the interval for the population mean?
Monday, February 9, 2015 at 11:48pm

statistics
A sample distribution (closely approximating a normal distribution) of a critical part dimension has an average of 11.85 inches and a sample standard deviation of 1.33 inches. The lower specification limit is 11.41 inches. The upper specification limit is 12.83 inches. What ...
Monday, February 9, 2015 at 11:44pm

statistics
A manufacturer of light bulbs has sampled 40 bulbs in order to determine the population mean life of the bulbs. The sample mean was 1,200 hours with a standard deviation of 100. The manufacturer would like to know, with 95% confidence, the interval values for the population mean
Monday, February 9, 2015 at 11:03pm

math (statistics)
The following table shows the percentage of individuals in each age group who use an online tax program to prepare their federal income tax return. AGE ONLINE TAX PROGRAM (%) 18-34 16 35-44 12 45-54 10 55-64 8 65+ 2 Suppose a follow-up study consisting of personal interviews ...
Monday, February 9, 2015 at 9:17pm

Statistics
Suppose we have yo estimate the average number of purchases in a given hour in a given hour at a convenient store. Using this example describe in your own words how you would go about this determining this average through: A.) Drawing a random sample B.) A Systematic sample C...
Monday, February 9, 2015 at 12:34pm

statistics
a researcher weighs each individual in a sample of 25 laboratory rats and calculates the average weight for the group. the average weight is an example of a ____ .
Sunday, February 8, 2015 at 8:59pm

statistics
Suppose we want to estimate the average number of purchases in a given hour in a local convenience store. Using this example describe in your own words how you would go about determining this average through: A.) Drawing a random sample: Drawing a random sample would be the ...
Sunday, February 8, 2015 at 1:08am

statistics
A coin is tossed 3 times. Find the probability that all the 3 are heads (A) if it is known that the first is heads (B) if it is known that the first 2 are heads (C) if it is known that the 2 of them are heads
Saturday, February 7, 2015 at 6:06am

writting skills
The World Almanac is a book of      A. facts and statistics. B. living notable Americans. C. synonyms. D. articles published in magazines.  
Friday, February 6, 2015 at 9:46pm

statistics
Describe whether the following study would most likely be “observational” or “experimental”, and why it would be so. * Mystery shoppers monitor the preferences at a shopping mall It seems the obvious answer would be observational because, "mystery ...
Friday, February 6, 2015 at 8:03pm

Statistics
In a study of pleas and prison sentences, it is found that 40% of the subjects studied were sent to prison. Among those sent to prison, 20% chose to plead guilty. Among those not sent to prison, 10% chose to plead guilty. 3.3.a (0.5 pt) If a study subject is randomly selected...
Friday, February 6, 2015 at 4:18pm

statistics
A candidate for a political office claims that he will win the election. A poll is conducted, and 35 of 150 voters indicate that they will vote for the candidate, 100 voters indicate that they will vote for his opponent, and 15 voters are undecided. a. What is the population ...
Friday, February 6, 2015 at 3:31pm

Statistics HELP
There are two bags each containing red balls and yellow balls. Bag A contains 1 red and 4 yellow balls. Bag B contains 3 red and 13 yellow balls. Alva says that if we choose one bag and draw one ball from that bag you should always choose bag B if you are trying to draw a red ...
Friday, February 6, 2015 at 9:12am

Statistics
An experiment consists of tossing a fair coin twice. The student reasons that there are three possible outcomes: two heads, one head and one tail, or two tails. Thus,P(HH) 1/3
Friday, February 6, 2015 at 8:38am

statistics
the standard score for hours spent online at home for Minnesotans was 2.84. The mean equals 8.9 hours. Approximately how many hours do Minnesotan adults spend online at home.
Wednesday, February 4, 2015 at 5:46pm

Math, Statistics
I know its 1 - P(5/128) but I dont think its correct?? I flip a fair coin seven times in a row. What is the probability that I get at most five heads?
Wednesday, February 4, 2015 at 5:40pm

statistics
A company has four production sections viz., S1, S2, S3 and S4 which contribute 30%, 20%, 28% and 22% of the total output. It was observed that those sections respectively produced 1%, 2%, 3% and 4% defective units. If a unit is selected at random and found to be defective, ...
Wednesday, February 4, 2015 at 8:08am

statistics
Produce a 99.9 % confidence interval for the population mean body temperature of a healthy male. Then do the same for the population of healthy females. Round your answers to three decimal places.
Tuesday, February 3, 2015 at 9:45pm

Statistics
Pop. Mean =87 Standard deviation=8 Sample size=64
Monday, February 2, 2015 at 11:50pm

Criminal Justice/Judicial System
According to the Justice Department's Bureau of Justice Statistics, ________ of every 100 murder and nonnegligent manslaughter defendants are convicted. A. 17 B. 68 C. 46 D. 31 I think it's B., but not sure
Monday, February 2, 2015 at 8:03pm

statistics
A professor gave an aptitude test to a class of psychology students and computed the mean, median, and mode for the test scores. Which of the following statements cannot be an accurate description of the scores? -All of the above statements are false. -The majority of the ...
Sunday, February 1, 2015 at 12:48pm

Statistics
The height of a bluebird was measured in centimeters. If the ruler reads 10.599 centimeters, what is the lower real limit of the bluebird's height? I know the lower limits of 10 are 9.5 or 10.5 after we go further I don't understand how to get the rest of the real ...
Saturday, January 31, 2015 at 3:56pm

statistics
The following contingency of frequencies is based on a 5-year study of fire fatalities in Maryland. For purposes of clarity, columns and rows are identified by the letters A-C and D-G, respectively. Blood Alcohol Level of Victim A B C Age 0.00% 0.01-0.09% ¡Ý0.10% ...
Saturday, January 31, 2015 at 9:40am

Statistics
The following contingency of frequencies is based on a 5-year study of fire fatalities in Maryland. For purposes of clarity, columns and rows are identified by the letters A-C and D-G, respectively. Blood Alcohol Level of Victim A B C Age 0.00% 0.01-0.09% ¡Ý0.10% ...
Saturday, January 31, 2015 at 9:35am

Statistics Helps
Carter has a large marble collection. Carter knows that he has exactly 20 blue marbles in his collection, but does not know how many marbles he has in all. Carter mixes up his marbles and randomly selects 40 marbles. Of the 40 marbles that he chose, 4 were blue. How many ...
Thursday, January 29, 2015 at 10:43pm

statistics
my question is: So if the chance is 1 in 17,259,390 of winning, what is the expected value of the win? How would I do this problem. Hope you can help. Thank you
Wednesday, January 28, 2015 at 2:02pm

english
Common Sense Media's research report shows kids are reading less than ever. Discover the startling statistics -- and what you can do to get your kids back into books. Do you have a teen who hardly reads? You're not alone. Common Sense Media's latest research report...
Tuesday, January 27, 2015 at 12:27pm

Statistics
Find the to left of z=2.165. Please example how to find on chart
Monday, January 26, 2015 at 12:35am

psychlogical statistics
A random selection of files from a student counseling center revealed the following reasons why college students seek services: Mental health issues - 25 Learning/school issues - 15 Relationship issues - 5 Other - 5 What is the probability that if we pulled another student ...
Saturday, January 24, 2015 at 8:56pm

statistics
In a class of 300 students, John’s rank was 40. Find his percentile rank
Saturday, January 24, 2015 at 1:21pm

statistics
In throwing a pair of dice The event of getting a sum of 5 in the upturned faces of dice.
Saturday, January 24, 2015 at 6:44am

statistics help please
The employment percentages for men versus women in a computer company last year were 80% and 40%, respectively. At the beginning of this year, they had 150 men and 60 women currently hired. The owner of the company wishes to check their hiring practices and ensure that the ...
Friday, January 23, 2015 at 7:44pm

statistics
The employment percentages for men versus women in a computer company last year were 80% and 40%, respectively. At the beginning of this year, they had 150 men and 60 women currently hired. The owner of the company wishes to check their hiring practices and ensure that the ...
Friday, January 23, 2015 at 6:19pm

Statistics
Subtract to find the area to the right of z=1.23: 1-0.8907=?
Friday, January 23, 2015 at 4:26pm

Math (Statistics)
What causes experimental probability to match theoretical probability?
Friday, January 23, 2015 at 3:42pm

statistics
suppose a sample of 2404 tenth graders is drawn.Of the sampled, 601 read at or below the eighth grade level. using the data, construct the 98% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level.
Friday, January 23, 2015 at 1:49pm

statistics
Suppose a large shipment of microwave ovens contained 18% defectives. If a sample of size 228 is selected, what isthe probability that the sample proportion will be greater than 14%? (Round your answer to 4 decimal places)
Friday, January 23, 2015 at 11:34am

Math (Statistics)
Hi! Can someone help me with these two questions? Thanks a bunch! :) 1.) What causes experimental probability to match theoretical probability? In theory heads and tails occur 50/50. 2.) Find a way to estimate the time to flip a coin 10,000 times; 100,000 times.
Friday, January 23, 2015 at 9:18am

statistics
I am trying to figure out how the answer of 0.989 came from the following equation of correlation. 7(-5)-(25)(13) _______________________ /7(127)-(25)*/x/7(71)-(13)*
Friday, January 23, 2015 at 6:46am

Math (Statistics)
Hi! Can someone help me with these two questions? Thanks a bunch! :) 1.) What causes experimental probability to match theoretical probability? In theory heads and tails occur 50/50. 2.) Find a way to estimate the time to flip a coin 10,000 times; 100,000 times.
Thursday, January 22, 2015 at 3:22pm

please answer statistics
Find warranty period (in days) for a washing machine whos average (mean) life is 6 years and standard deviation of 2.5 years. Assume 365 days in a year.
Thursday, January 22, 2015 at 2:26pm

statistics
Derive one Tail and Two Tail numbers for c = 0.88 or alpha = 0.12.
Thursday, January 22, 2015 at 2:22pm

STATISTICS(PLEASE READ)
Find warranty period (in days) for a washing machine whos average (mean) life is 6 years and standard deviation of 2.5 years. Assume 365 days in a year.
Thursday, January 22, 2015 at 2:06pm

statistics
The batting averages of the first three batters in the Eureka College women’s softball team lineup are .310, .301, and .277. If the first three batters are considered as the “lead-off group”, what is the batting average of the group?
Thursday, January 22, 2015 at 9:03am

statistics
The following is a list of 10 measurements: after adding and sub all 10 numbers I came up with a -29. Now it wants the sum 10/i,i than xi over 32. Do I x -29 and the 32 or do I divide. This is were I get very confused. I am sorry to ask again but I never taken statistic oh I ...
Wednesday, January 21, 2015 at 7:53pm

statistics
As part of a data base on new births at a hospital some variables recorded are the age of the mother, marital status of the mother (single, married, divorced), weight of the baby, and gender of the baby. Of these variables A. age, marital status, and weight are quantitative ...
Wednesday, January 21, 2015 at 6:53pm

statistics
A) Identify the question, population, and sample. b) Discuss any potential bias or lurking variables that may affect the results.? c) Write about the extent to which we can generalize the findings to all people who use cell phones. Stewart Fist reported the results of an ...
Wednesday, January 21, 2015 at 2:12pm

Statistics
A) Identify the question, population, and sample. b) Discuss any potential bias or lurking variables that may affect the results.? c) Write about the extent to which we can generalize the findings to all people who use cell phones. Stewart Fist reported the results of an ...
Wednesday, January 21, 2015 at 11:18am

statistics
A) Identify the question, population, and sample. b) Discuss any potential bias or lurking variables that may affect the results.? c) Write about the extent to which we can generalize the findings to all people who use cell phones. Stewart Fist reported the results of an ...
Wednesday, January 21, 2015 at 8:15am

statistics(please answer!)
Derive one Tail and Two Tail numbers for c = 0.88 or alpha = 0.12.
Tuesday, January 20, 2015 at 8:56pm

statistics(please answer!)
find P( t > 5) for DF =2.
Tuesday, January 20, 2015 at 8:38pm

statistics(please answer!)
find a t score (a) such that P( -a < t < a) = 0.95. Asume sample size n = 10.
Tuesday, January 20, 2015 at 8:26pm

statistics(please answer!)
Find a t score (a) such that P( -a < t < a) = 0.95. Asume sample size n = 10.
Tuesday, January 20, 2015 at 8:16pm

statistics(please answer!)
What is the chance of getting 50/% correct on a test with 20 questions, each question is either True or False. Assume you are blindly guessing and answer all questions
Tuesday, January 20, 2015 at 4:11pm

Statistics (Please Please Answer!)
i bought a vegetable seed pocket containing 20 seeds. A manufacturer label on the pocket said that the seeds have at least 90% germination rate. I planted all 20 seeds following their instructions in preparing soil and water. They told me if an "unlikely event" ...
Tuesday, January 20, 2015 at 3:59pm

statistics(please answer!)
i bought a vegetable seed pocket containing 20 seeds. A manufacturer label on the pocket said that the seeds have at least 90% germination rate. I planted all 20 seeds following their instructions in preparing soil and water. They told me if an "unlikely event" ...
Tuesday, January 20, 2015 at 3:13pm

Psychology Statistics
Submit your answers to the following questions using the ANOVA source table below. The table depicts a two-way ANOVA in which gender has two groups (male and female), marital status has three groups (married, single never married, divorced), and the means refer to happiness ...
Tuesday, January 20, 2015 at 2:53pm

statistics
i bought a vegetable seed pocket containing 20 seeds. A manufacturer label on the pocket said that the seeds have at least 90% germination rate. I planted all 20 seeds following their instructions in preparing soil and water. They told me if an "unlikely event" ...
Tuesday, January 20, 2015 at 2:00pm

statistics
Post a null hypothesis that would use a t test statistical analysis.. Use the same hypothetical situation taken in the t test hypothesis, and turn it into a null hypothesis using a one-way ANOVA analysis and a two-way ANOVA.
Tuesday, January 20, 2015 at 12:42pm

statistics
What is the chance of getting 50/% correct on a test with 20 questions, each question is either True or False. Assume you are blindly guessing and answer all questions
Monday, January 19, 2015 at 7:43pm

statistics
Would it be appropriate to use a random number table to select a digit for each blank square in sudoku
Monday, January 19, 2015 at 6:34pm

statistics
The 2003 Statistical Abstract of the United States reported the percentage of people 18 years of age and older who smoke. Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of .32. a. How large a ...
Sunday, January 18, 2015 at 1:40pm

Statistics
A survey or college students collected information on several variables: distance from home, age, major, gender, and class. The variable major is A) neither categorical nor numerical B) categorical C) quantitative Please help :)
Sunday, January 18, 2015 at 12:47am

Statistics
When ordering vinyl replacement windows, the following variables are specified for each window. Which of these variables is quantitative? A) window style- double hung, casement, or awning B) window style- single pane or double pane C) area of the window opening in square inches
Sunday, January 18, 2015 at 12:25am

Statistics
An instructor asked students to name their favorite color. An appropriate graph to display the data is a... A) histogram B) pie chart C) time plot
Sunday, January 18, 2015 at 12:23am

math
• what is statistics • Perspective statistics • inferential statistics • Data statistics • Example of a Quantitative data • Example of a Qualitative data • What is population •what are the different scale of measurement • what are ...
Saturday, January 17, 2015 at 9:08pm

law
where can I find statistics crime rates in missouri
Saturday, January 17, 2015 at 6:30pm

statistics
In a class of 100 students, 30 are computer science majors, 49 are mechaincal engineering majors, 13 are civil engineers and the rest are general engineering majors. Assume students only have one major. If a student is chosen at random what is the probability they are: a civil...
Friday, January 16, 2015 at 9:23pm

statistics
Use the given information to find the minimum sample size required to estimate an unknown population mean μ. How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 99% confidence that the sample mean is within 4 ...
Friday, January 16, 2015 at 6:05pm

statistics
a statistics instructor collected data on the time it takes the students to complete a test. the test taking time is uniformly distributed within a range of 35 minutes to 55 minutes. determine the standard deviation, what is the probability a particular student will take less ...
Tuesday, January 13, 2015 at 10:51pm

statistics
Statistics students were asked to go home and fill a 1-cup measure with raisin bran and to tap the cup gently on the counter 3 times to settle the contents. Then, if necessary, add more raisin bran to bring the contents exactly up to the 1-cup line. Once at the 1-cup line, the...
Tuesday, January 13, 2015 at 6:39pm

statistics
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
Monday, January 12, 2015 at 7:55pm

Statistics
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours
Monday, January 12, 2015 at 7:53pm

statistics
Can you explain how to do this problem The following is a list of 11 measurements: 72, 28, 56, -47, -36, -41, 21, -31, -56, 41, -54 . Suppose that these 11 measurements are respectively labeled x1, x2,...x11 . (Thus,72 is labeled x1 ,28 is labeled x2 and so on.) Find 11 looks ...
Monday, January 12, 2015 at 6:00pm

Statistics
Can someone help me with this question. I am so very confused. Find the y-intercept of the line whose equation is y=0.7x +6.2. could the answer be 5
Monday, January 12, 2015 at 2:26pm

Statistics
Did you ever buy an incandescent light bulb that failed (either burned out or did not work) the first time you turned the switch on? When you put a new light bulb into a light fixture, you expect it to light and most of the time it does. Consider 8-packs of 60-watt bulbs and ...
Monday, January 12, 2015 at 1:24pm

Statistics
The image of the public library is constantly changing, and their online services continue to grow. Usage of the library's home page grew by 17% during the past 12 months. It has been estimated that the current average length of a visit to the library's home pages is ...
Monday, January 12, 2015 at 1:16pm

Statistics
A company that produces rivets used by commercial aircraft manufactures knows that the shearing strength (force required to breaking) of its rivets is a major concern. The company believes the shearing strength of its rivets is normally distributed with a mean of 925 lbs and a...
Monday, January 12, 2015 at 1:12pm

statistics
One of nature's patterns connects the percent of adult birds in a colony that return from the previous year and the number of new adults that join the colony. Following are data for 13 colonies of sparrowhawks: Percent return 73 61 79 54 75 62 53 46 57 50 62 45 35 New ...
Sunday, January 11, 2015 at 9:33am

College Algebra
According to data from the National Vital Statistics Report, the marriage rate (marriages per 1000) can be described by y=-0.146x+11.074, where x is the number of years after 1980. For what years does this model indicate that the marriage rate was above 9 marriages per 1000? ...
Thursday, January 8, 2015 at 1:27am

Psychological Statistics
For a population with a mean of 80 and a standard deviation of 12, what is the Z score corresponding to an individual score of 92
Wednesday, January 7, 2015 at 6:17pm

Vocabulary Studies
Building and construction A. Architecture B. Engineering C. Nursing D. Statistics I think it might be A?
Tuesday, January 6, 2015 at 12:18pm

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Homework Help: Math

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