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Recent Homework Questions About Statistics
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statistics
refer to a bag of marbles containing 5 green marbles, 4 red marbles and 2 yellow marbles. Three marbles are drawn from the bag, without replacement. What is the probabilty that all three marbles drawn are green?
statistics
2. The daily maximum temperature (T) on an island has approximately a normal distribution with a mean of 78 degree (F) and a standard deviation of 5 degree F on what proportion of days is the maximum temperature: a. Greater than 70 degrees F b. Greater than 85 degrees F
Statistics
Calculate the following: a) Determine the sample size necessary to estimate a population mean to within 1 with a 90% confidence given that the population standard deviation is 10. b) Suppose that the sample was calculated at 150. Estimate the population mean with 90% confidence.
statistics
A data set consists of a set of numerical values. Which, if any, of the following statements could be correct? There is no mode. There are two modes. There are three modes.
Statistics
Determine the sample size necessary to estimate a population proportion to within .03 with 90% confidence assuming you have no knowledge of the approximate value of the sample proportion.
Statistics
Draw the operating characteristic curve for n = 10, 50, and 100 for the following test: Ho: ì = 400 Hi: ì > 400 á = .05, ó = 50
Statistics
HO: µ = 70 H1: µ > 70 ó = 20, n = 100, xbar = 80, á = .01 a) calculate the value of the test statistic b) set up the rejection region. c) determine the p-value d) interpret the results
statistics
A statistics practitioner would like to estimate a population mean to within 50 units with 99% confidence given that the population standard deviation is 250. a) What sample size should be used. b) Repeat part (a) with a standard deviation of 50. c) Repeat part (a) using a 95%...
Statistics
The high temperature X (in degrees Fahrenheit) on January days in Columbus, Ohio varies according to the Normal distribution with mean 21 and standard deviation 10. the value of P(X<10)is?
Statistics
The high temperature X (in degrees Fahrenheit) on January days in Columbus, Ohio varies according to the Normal distribution with mean 21 and standard deviation 10. the value of P(X<10)is?
statistics
In hypothesis testing, why are verbal problem statements converted to numerical problem statements? Why is it important to identify the parameter when converting a problem statement from verbal to numerical? Why do a null and alternative hypothesis have to be mutually exclusive?
statistics
The accounting department at Weston Materials, Inc., a national manufacturer of unattached garages, reports that is takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the red barn model. Assume the assembly times follow the normal di...
statistics
if the mean of a set of data is 23.00, and 12.60 has a z-score of -1.30, then what is the standard deviation?
Statistics
A die that is fair will have each face of the die come up one-sixth of the time in the long run. The population for die throwing contains the results of throwing the die an infinite number of times. For this problem, the parameter of interest is p is the probability of rolling...
Statistics
A student group claims that first-year students at a university must study 2.5 hours (150 minutes) per night during the school week. A skeptic suspects that they study less than that on the average. A class survey finds that the average study time claimed by 269 students is = ...
statistics
My question is: The school action society asked its members how many hours they had worked during the previous week in part-time jobs. The following data lists the number of hours spent working during the previous week. 6 6 6 4 6 6 9 8 6 3 7 6 6 7 6 6 7 6 6 8 6 7 8 4 a: from t...
Statistics
Two cards are drawn in succession from a standard deck of 52 cards without replacing the first one before the second. a) Are these outcomes are independent? Why? b) Find P ( 3 on 1st card and 10 on the 2nd card) c) Find P( 10 on the 1st card and 3 on 2nd card) d) Find the Prob...
statistics
what does 9E-4 mean? It came up as an answer to a problem i went through on my calculator
Psychology/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 Unive...
statistics
what is an example of a statistical abuse in the media during the past week?
statistics
survey revealed two percent of students did not select stat. for biz. suppose we select a sample of 10 students. -what is the probability that 3 students selected stat. for biz? -how many students would you expect to select stat.for biz?
statistics
how many ways can an IRS auditor select 5 of 12 tax returns for an audit?
college STATISTICS
Sample of 80 people randomly asked in casino shows that average lost per person is $160 with a standard deviation ó = $40. Based on this data create a 99% confidence interval for population mean. Does loss of $180 for single person contradict expectation? Explain your a...
Statistics
The structure of a two-factor study can be presented as a matrix with the level of one factor determining the rows and the levels of the second factor determining the colums.With this structure in mind,describe the mean differences that are evaluated by each of the three hypot...
to Mary - re "Math (basic statistics) ..."
Your post has been removed. Once you write up YOUR THOUGHTS, please re-post, and someone here will be happy to comment.
statistics
blanking on formula for this question: 1038 people polled; 540 said yes. what % said yes?
statistics
Assume that Acme Tires sells their high performance tires for $180 each and their all weather tires for $135 each. Further assume that the cost of producing a high performance tire is $150 and the cost of producing an all weather tire is $120. Finally, assume that if a tire do...
statistics
What is the expected value (expected profit) of producing an all weather tire?
Need an opinion
I'm doing a speech on teen suicide and I need your opinion. I start with an introduction, statistics, and why I chose the topic. But for these three things is the order correct or should switch them. If you were listening what would you like to hear first. What are the war...
statistics
Considering that a researcher can test at the <p = .05 (95%), p = .01 (99%), or p = .001 (99.9%) level for statistical significance, how would you use these three levels in relationship to risk to patients in implementing the decisions of your research?
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?
Statistics
There are 100 marbles in a bag. 200people are asked to draw a ball. Each marble drawn is put back into the bag before the next draw. 7 people draw red color marbles. How many red marbles are there in the bag?
Statistics
2. The arrivals of customers at a drive-in banking window are governed by the Poisson distribution. Each customer requires 5 minutes to transact his or her business at the drive-in window. The average customer arrival rate is 10 per hour. A customer arrives at random. What is ...
Statistics
An American style roulette wheel has individual compartments for the numbers 1 to 36, plus 0 and 00. If the payoff for a single-number bet is 35:1, what is the expected value of the winnings on any single-number bet?
Statistics
The USDA size standards for eggs are based on weight and are as follows: SMALL: greater than 43 grams, less than 50 grams MEDIUM: greater than 50 grams, less than 57 grams LARGE: greater than 57 grams, less than 64 grams EXTRA LARGE: greater than 64 grams, less than 71 grams J...
Statistics
You are a State Trooper on a roadblock. Since it is New Year’s Eve, you know from prior experience that approximately 5% of the drivers on the road have blood alcohol content over the legal limit of 0.08%. Your portable breathalyzer gives a PASS / FAIL reading. From prior...
Statistics
You are a buyer bidding on a lot of 10,000 uncut diamonds. You select 100 stones at random, sight unseen, from the lot. The average weight is 0.98 ct with a standard deviation in the sample of 0.11 ct. What is the 95% confidence interval for the average weight of a stone in th...
Statistics
Over a one-year period, it is observed that on approximately five percent of the days, a particular public telephone in a remote part of an airport is not used at all. On ninety-five percent of the days it is used, but the number of users is not known. Make a reasonable estima...
Statistics
A disk drive manufacturer has determined that his product has a “mean time to failure” of 10,000 hours, with a standard deviation of 500 hours. Due to the many factors involved, it is assumed that the time to failure is normally distributed. A network operations cent...
english
I am trying to find out how many copies of the novel "Brave New World" by Aldous Huxley have been sold worldwide or even in Australia. I can't find the statistics anywhere. Can someone please help??
statistics
find the z-score corresponding to a score of X=60 for the each of the following distributions. u=50 and 0=10 u=50 and 0=5
statistics
2.0,3.7,4.9,5.0,5.7,6.7,8.5,and 9.0 what is the range? median? mean? mode?
Statistics
I'm looking at my notes and I can't seem to figure how my teacher did this problem. She used her name which has 9 letters, 3 vowels, and 6 consonants. If we were to reach in the bag and grab 3 letters out. By using the probability distribution what's the probabilit...
Statistics
1. Use the following to answer questions: The table below presents the probability distribution for X = the number of email messages you will receive in the next 10 minutes. (9 pts) X 0 1 2 3 P(X) .35 .35 .25 .05 a. What is the probability that no emails will be received? b. W...
Statistics
An experiment consists of rolling a die and selecting a marble from a bag. the bag has 7 orange, 3 pink, and 6 grey marbles. What is the probability of rolling a multiple of 3 and selecting a pink marble? Anwer: The two events are independent of each other, therefore we multi...
statistics
An experiment consists of rolling a die and selecting a marble from a bag. the bag has 7 orange, 3 pink, and 6 grey marbles. What is the probability of rolling a multiple of 3 and selecting a pink marble? Anwer: The two events are independent of each other, therefore we multip...
To: Ms. Sue
Ms. Sue I need statistics on Sav. Syn. I tried looking on the internet for them everywhere, but there is nothing there. Could you please give me a list of sites for them. I want charts on them, please and thank you :-)
statistics
Is the standard deviation of the entire sampling distribution of means a statistic or a parameter?
Statistics
The American Veterinary Association claims that the annual cost of medical care for dogs averages $100, with a standard deviation of $30, and for cats averages $120, with a standard deviation of $35. A)Whats the expected difference in the cost of medical care for dogs and cats...
ap statistics
an opinion poll asks a sample of 500 adults (an SRS) whether they favor giving parents of school age children vouchers that can be exchanged for education at any public or private school of their choice. Each school would be paid by the government on the basis of how many vouc...
statistics
is this quantitative data? The number of new hybrid cars on a local car dealership lot
statistics
is this qualitative data? The colors of new hybrid cars on a local car dealership lot.
statistics
Is this a descriptive study or an inferential study. I say inferential...... The average professional musicians’ salaries (in thousands) in the United States, England and Germany were complied and compared for years 1997 and 2007. Country 1997 2007 United States 1,200 2,2...
statistics
Is this a descriptive study or an inferential study. I say descriptive...... The table below shows the average income by age group for residents of a small mid-western town in 2001 based on a sample of 200 individuals from each group. Age Group Average Income 18 – 25 $ 19...
statistics
A sample of 25 concession stand purchases at the October 22 matinee of Bride of Chucky showed a mean purchase of $5.29 with a standard deviation of $3.02. For the October 26 evening showing of the same movie, for a sample of 25 purchases the mean was $5.12 with a standard devi...
statistics
To test the hypothesis that students who finish an exam first get better grades, Professor Hardtack kept track of the order in which papers were handed in. The first 25 papers showed a mean score of 77.1 with a standard deviation of 19.6, while the last 24 papers handed in sho...
Statistics
What key words tell you that the Hypothesis is to be set up as a 1 Tail UPPER?
Statistics
The Gibbs Baby Food Company wishes to compare the weight gain of infants using their brand versus their competitor’s brand. A sample of 40 babies using the Gibbs products revealed a mean weight gain of 7.6 pounds in the first 3 months after birth. The standard deviation o...
Statistics
8. A sample of 65 observations is selected from one population. The sample mean is 2.67 and the sample standard deviation is .75. A sample of 50 observations is selected from a second population. The sample mean is 2.59 and the sample standard deviation is .66. Conduct the fol...
statistics
7. A sample of 40 observations is selected from one population. The sample mean is 102 and the sample standard deviation is 5. A sample of 50 observations is selected from a second population. The sample mean is 99 and the sample standard deviation is 6. Conduct the following ...
statistics
Please analyze the following data using the T-test for Unpaired data: A school district wants to determine if the girls are equal to boys in test scores. They took a random sample of 22 8th grade girls and 24 8th grade boys. The district looked at recent CAT scores and found t...
statistics
Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking—even if they are not exposed to the usual pattern of sunlight. To test...
statistics
A medical statistician wanted to examine the relationship between the amount of sunshine (x) and incidence of skin cancer (y). As an experiment he found the number of skin cancers detected per 100,000 of population and the average daily sunshine in eight counties around the co...
statistics
Cholesterol levels of adult males are approximately normally distributed with a mean of mg/dL and a listed standard deviation of . Some researchers claim that the standard deviation of cholesterol levels of adult males is less than . Suppose that we want to carry out a hypothe...
statistics
Cholesterol levels of adult males are approximately normally distributed with a mean of mg/dL and a listed standard deviation of . Some researchers claim that the standard deviation of cholesterol levels of adult males is less than . Suppose that we want to carry out a hypothe...
Statistics
Is anyone really good at research statistics?
Statistics
Looking for someone to verify my homework answers on identifying the sample and population...... 1) A group of 50,000 randomly selected adults were survey about whether they drink at least 6 - 8 oz glasses of water each day. Only 35% said yes to the question. Q: What is the sa...
statistics
we want to if men and women perform differently on statistics tests. The average of 15 men's scores was 76. The average of 10 women's scores was 83. The standard deviation in both cases is 10. Test at 5% significance level. what is the null and alternate hypothese? is ...
statistics
Apoll of 100 Phoenix graduates showed that 32 of them received a promotion within two years. A poll of 200 non-graduates showed that 40 of them received a promotion. We wish to know if a Phoenix degree improves your chance to get a promotion.
statistics
if the mean of a distribution is M=48, what is the new mean if each score is divide by 3/4, and then 35 is subtracted from each
psychology statistics
The three commonly used alpha levels are p=01, p=05, and p=10 a. Explain what each level means. b. Which one of the three is more frequently used in research?
statistics
For each of 10 popular prescription drugs, file XR15042 lists the retail price (in U.S. dollars) for the drug in several different countries, including the United States, Canada, Great Britain, and Australia. Determine and interpret the coefficients of correlation and determi...
statistics
College students average 7.8 hours of sleep per night with a standard deviation of 45 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep for more than 9 hours?
Statistics
True or False Probabilities may take on negative values only when the events are occurring less than 50% of the time.
Statistics
True or False Probabilities may take on negative values only when the events are occurring less than 50% of the time.
statistics
True or False A negative z score must yield a negative probability value.
Statistics
How do you know the p-value on megastat. On minitab It looks like it gets a different p-value than megastat. I got a number from megastat of 2.35E10 and on minitab it was 0.000.
statistics
How do you know the p-value on megastat. On minitab It looks like it gets a different p-value than megastat. I got a number from megastat of 2.35E10 and on minitab it was 0.000.
Statistics
7 cards drawn from a deck without replacement what is probabilty one is a spade
statistics
The US Senate consists of 100 senators, 2 from each state. A group of 5 senators is formed. 1.) how many groups are possible? 2.)how many are possible if no 2 senators from the same state can be chosen? 3.)what is the probability that no 2 from the same state are chosen? for 1...
statistics
In response to the increasing weight of airline passengers, the Federal Aviation Administration in 2003 told airlines to assume that passengers average 190 pounds in the summer, including clothing and carry-on baggage. But passengers vary, and the FAA did not specify a standa...
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?
business
the fact that 60 percent of eastside clinic's patients have income below the poverty line illustrates that community's a. demographics b. population statistics c. patient financial transactions d. clinical record i think the answer is a. demographics
statistics
Number sampled is 1,000 and mean is 7.2 on a scale from 1-10 how do I determine standard deviation. Can we answer this with using the sampling distribution of the sample proportion?
statistics
If sample number is 1,000 and mean is 7.2 on a scale from 1-10 how do I determine standard deviation.
Statistics
Sample salaries (in dollars) of high school teachers are listed. Find the sample mean and standard deviation of the data. 49,632 54,619 58,298 48,250 51,842 50,875 43,219 49,924
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?
Statistics
In a Gallup poll of 1,038 adults, 540 saud that second-hand smoke is very harmful. What is the percentage of adults who said second-hand smoke is very harmful?
statistics
A test given to a class reveals most did well but a few did poorly. what is the distribution of the test scores?
Statistics
I am stuck on this probability question: Any suggestions of where to start would be great!! Thanks! Given 20 people, what is the probability that among the 12 months in the year there are 2 months containing exactly 4 birthdays each and there are 6 months containing exactly 2 ...
statistics
You have an interesting deck of cards: there are an unknown number of different types of cards, each card type is repeated many times (let's say infinitely), if these cards are placed face down, how many must you flip over before you are fairly confident you have found all...
statistics
what is the actual base of the sears tower
statistics
If ten households in this area are selected at random, what is the probability that exactly two of them will be in violation of this law?
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 Unive...
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 Unive...
statistics
The average number of radioactive particles passing through a counter during 1 millisecond in a lab experiment is 4. What is the probability that more than 2 milliseconds pass between particles?
Statistics
An Experiment consists of flipping a fair coin once and rolling a fair die once. what is the probability of observing a hear or six?
Statistics
A recent article in a computer magazine suggested that the mean time to fully learn a new software program is 40 hours. A sample of 100 first-time users of a new statistics program revealed the mean time to learn it was 39 hours with the standard deviation of 8 hours. At the 0...
statistics
Suppose that one in every 100 people in a certain community is infected with HIV. You want to indentify an HIV-positive person to include inn a study of an experimental new drug. How many indiviuals would you expect to have to interview in order to find the first person who is...
statistics
International Pictures is trying to decide how to distribute its new movie ‘Claws’. ‘Claws’ is the story of an animal husbandry experiment at the University of Southern Queensland that goes astray, with tragic results. An effort to breed meatier chickens so...
statistics
An insurance company wishes to examine the relationship between income (in $,000) and the amount of life insurance (in $,000) held by families. The company drew a simple random sample of families and obtained the following results: Family(Income)(Amount of life insurance) A 50...
statistics
The tourist industry is subject to enormous seasonal variation. A hotel in North Queensland has recorded its occupancy rate for each quarter during the past 5 years. These data are shown in the accompanying table. Table 1: Occupancy rate Year 2004 2005 2006 2007 2008 Quarter 1...
statistics
An insurance company wishes to examine the relationship between income (in $,000) and the amount of life insurance (in $,000) held by families. The company drew a simple random sample of families and obtained the following results: Family(Income)(Amount of life insurance) A 50...
statistics
The tourist industry is subject to enormous seasonal variation. A hotel in North Queensland has recorded its occupancy rate for each quarter during the past 5 years. These data are shown in the accompanying table. Table 1: Occupancy rate Year 2004 2005 2006 2007 2008 Quarter 1...
statistics
International Pictures is trying to decide how to distribute its new movie ‘Claws’. ‘Claws’ is the story of an animal husbandry experiment at the University of Southern Queensland that goes astray, with tragic results. An effort to breed meatier chickens so...
statistics
Refer to the following table which contains the sales (in $,000) for a department store for the first ten months of the year. Month Sales January 440 February 480 March 590 April 400 May 500 June 550 July 470 August 500 September 600 October 520 Using a three period moving ave...
statistics
The data below represents the amount of grams of carbohydrates in a sample serving of breakfast cereal. 10 18 24 30 19 22 24 20 18 25 20 22 19 The variance for this data would be __________ grams.
statistics
The manager of a service station is in the process of analyzing the number of times car owners change the oil in their cars. She believes that the average motorist changes his or her car's oil less frequently than recommended by the owner's manual (two times per year)....
statistics
In a local cellular phone area, company A accounts for 70% of the cellular phone market, while company B accounts for the remaining 30% of the market. Of the cellular calls made with company A 2% of the calls will have some sort of interference, while 3% of the cellular calls ...
statistics
In a local cellular phone area
Statistics
The diameters of a wooden dowel produced by a new machine are normally distributed with a mean of 0.55 inches and a standard deviation of 0.01 inches. What percent of the dowels will have a diameter greater than 0.57?
Statistics
Five friends go bowling and finish with the following scores. Jim bowls a 129, Bob bowls a 150, Ann bowls a 133, Tom bowls a 162 and Gina bowls a 148. Find Tom's z-score. Treat the data as a population. Don't forget to round to the nearest tenth. The book says value-me...
statistics
True or False: A zero population correlation coefficient between a pair of random variable means that there is no linear relationship between the random variable.
statistics
Blossom's Flowers purchases roses for sale for Valentine's Day. The roses are purchased for $10 a dozen and are sold for $20 a dozen. Any roses not sold on Valentine's Day can be sold for $5 per dozen. The owner will purchase 1 of 3 amounts of roses for Valentine&#...
statistics
A sample of n = 20 scores has a mean of M = 6. If one new person with a score of X = 27 is added to the sample, what will be the value for the new mean?
Statistics
In Los Angeles there are three network television stations, each with it own evening news program from 6:00 to 6:30 PM. According to a report in this morning’s local newspaper, a random sample of 150 viewers last night revealed 53 watched the news on KNBC (channel 2), 64 ...
statistics
True or False; A good choice for the number of class groups to use in constructing frequency distribution is to have at least 5 but not more than 15 class groups.
Statistics
Ok please help me. Here is my stats question Suppose there is a 20% chance of striking oil at a certain location. An oil company drills at 5 different spots. What is the probablity of them striking oil on at least one of the spots? Any help is greatly appreciated
Business Math and Statistics
Suggest if the company need to set aside the lump sum of money that will collect interest or company should purchase annuities. Support your suggestion with argument.
statistics
According to a recent survey, 38% of americans get 6 hours or less of sleep each night. If 25 people are selected, find the probability that 14 or more people will get 6 hours or less sleep each night..
Statistics
How do you determine if there's a statistically significant difference between two data sets/values? Thanks!
statistics
What is the value of the z-scores if the area of the curve to this point is 0.887? How much of this are is between the peak of the curve and this point?
statistics
HOW DO YOU WORK WITH NUMBERS IN A SERIES LIKE 38 36 30 28 22 : THENEXT NUMBER WOULD BE WHAT . OR 2 5 11 20 32 47 AND THE NEXT NUMBER IN THE SERIES WOULD BE WHAT
Statistics
Students were given an exam with 300 multiple-choice questions. The distribution of the scores was normal and mean was 195 with a standard deviation of 30. What were the scores of the students who were within one standard deviation of the mean? What percent of students did tha...
statistics
Given the following situation, how would you use Megastat to test whether the population defective rate is greater than 10%? Please outline the process for the test and, if necessary, including the output from Megastat to explain your approach. What conditions do you need to c...
Statistics
Define a relation R on N such that there is a one-to-one correspondence between R and N.
Statistics
Let N= {1,2,3,...}, that is, N is the set of natural numbers. Find a proper subset X of N such that there is not a one-to-one correspondence between X and N. Find a proper subset Y of N such that there is a one-to-one correspondence between Y and N.
Statistics
A class has 50 students. 13 are juniors, 20 are psych majors, and 24 are neither psych majors nor juniors. How many psych majors are juniors?
statistics
Show that for all three distributions (Binomial, Poisson and Geometric) the probability of finding at least one ace is around 55%
Statistics
Please post your response in this question here is my original question that didn't get answered. h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 4 5 5 3 7 3 0
Statistics
Considering that a researcher can test at the <p = .05 (95%), p = .01 (99%), or p = .001 (99.9%) level for statistical significance, how do you use these three levels in relationship to evaluate risk to patients in implementing the decisions based on research findings?
statistics
If a researcher were studying the effects of a teaching method on patient learning outcomes, how does the research question need to be worded to use a t-test to test for statistical differences? What type of data needs to be collected and why?
Statistics
I don't mind you showing me the caluclator key strokes to do this or show me the mathematical way whice ever thanks Here is a simple probability model for multiple-choice tests. Suppose that a student has probability p of correclty ansering a question chosen at random form...
statistics
From a single deck of cards, you select a card, look at it, put it back in the deck and shuffle. If you do this 10 times, what is the probability of drawing exactly... a) 1 Ace b) 2 Aces
statistics
From a single deck of cards, you select a card, look at it, put it back in the deck and shuffle. If you do this 10 times, what is the probability of drawing exactly... a) 1 Ace b) 2 Aces
Statistics
From a single deck of cards, you select a card, look at it, put it back in the deck and shuffle. If you do this 10 times, what is the probability of drawing exactly... a) 1 Ace b) 2 Aces
Statistics
How can I calcualate the probability of a normal distribution. Please present formula and an example. Thanks.
Statistics
Formula used to calculate confidence interval..please give example. Thanks
Statistics
Formula used to easily calcuate sample size. Please give example.
Statistics
Construct a descriptive statistics for 100 employees using intervals of 0-4, 4-8, 8-12, 12-16, 16-20.
Statistics
Construct a frequency distribution for 100 employees using intervals of 0-4, 4-8, 8-12, 12-16, 16-20.
Statistics
Comcast wants to know the percent of their cable subscribers who use the internet at home. How large of a sample size should they survey to determine the proportion who use the internet within 2% and with 90% confidence interval. Please show formula when computing sample size.
Statistics
A bank wishes to estimate the mean balances owed by their MasterCard customers within $75. The population standard deviation is estimated to be $300. If a 98% confidence interval is used, how many cardholders should be sample. Please provide sample size formula in calcutions.
Statistics
A data contains a random sample of 100 employees with eduation levels. Please construct a 90% confidence interval of the proportion of employees, which is 51 total, who do not have a college degree.
Statistics
A resort tracks the number of days each guest stays. They've discovered that this variable is normally distributed with a mean of 9 days and a standard deviation of 3. They would expect 10% of the guest stay longer than how many days? Please show statistics formula and cal...
Statistics
The mean amount spent by a family on food per month is $500 with a standard deviation of $75. Assuming that the food costs are normally distributed, what is the probability that a family spends more than $410 per month? Plesase show formula and calcuation.
statistics
At Guadalajara Airport, passengers must claim their luggage and then proceed to Customs. In the Customs area, each passenger will press a button that activates a modified stoplight. This light has only red and green bulbs. If the green light shows, the passenger is free to go....
Statistics
Are large or small data sets more appropriate for using perecentiles to summarize data? Why?
business statistics
1.to measure how much the cost of some variable changes over time, you would use? 2.if an index number calculation over 8 years with a base value of 100 gave an index for 1993 of 110, what would be the percentage relative for 1993?
Statistics
70% of the student body of a very large post-scondary institution is female. In a random sample of 12 students, what is the probability that: a) at most half will be females b) more than 7 will be females c) fewer than 3 will be males I used the Table of Binomial Probabilities...
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