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August 2, 2014

Homework Help: Math: Statistics

Recent Homework Questions About Statistics

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statistics
Shown below are rental and leasing revenue figures for office machinery and equipment in the United States over a sever-year period according to the U.S. Census Bureau. Use these data to run a linear regression and then forecast the rental and leasing revenue for the year 2012...
Monday, July 8, 2013 at 11:53am

Statistics
In the Federal Trade Commission (FTC) \Price Check" study of electronic checkout scanners, the FTC inspected 1,669 scanners at retail stores and supermarkets by scanning a sample of items at each store and determining if the scanned price was accurate. The FTC gives a ...
Monday, July 8, 2013 at 11:39am

Statistics
How would a histogram change if we increase the number of simulations? A. It would simply be more smooth. B. The p-value would get smaller. C. The standard error would get smaller. D. The distribution would be more similar to a T-distribution.
Monday, July 8, 2013 at 4:25am

Statistics
The Centers for Disease Control (CDC) collects yearly statistics on drinking behavior in the United States by surveying a random sample of U.S. adults. The following data display the percent of adults aged 18 years and over who had 5 or more drinks in 1 day at least once in ...
Monday, July 8, 2013 at 4:13am

Statistics - Help!
I really really need help with this. Can someone please look at it and let me know. At 100 college campuses, 1200 full-time undergraduate students were surveyed on their credit card usage. Among juniors, 65% reported that they didn't have a credit card in their own name, ...
Sunday, July 7, 2013 at 9:33pm

Statistics
Examples please!Create a drawing or plan for a 2 x 3 experimental design that would lend itself to a factorial ANOVA. Be sure to identify the independent and dependent variables.
Sunday, July 7, 2013 at 8:17pm

Statistics
An analysis of variance was used to evaluate the mean differences from a repeated-measures research study. The results were reported as F(3,24)=6.40. a. How many treatment conditions were compared in the study? b. How many individuals participated in the study?
Sunday, July 7, 2013 at 8:16pm

Statistics
A researcher reports an F-ratio with df= 2, 12 for a repeated measures of ANOVA. a. How many treatment conditions were compared in the study? b. How many individuals participated in the study?
Sunday, July 7, 2013 at 8:16pm

statistics
A researcher reports an F-ratio with df= 2, 12 for a repeated measures of ANOVA. How many treatment conditions were compared in the study?
Sunday, July 7, 2013 at 7:16pm

Statistics
At 100 college campuses, 1200 full-time undergraduate students were surveyed on their credit card usage. Among juniors, 65% reported that they didn't have a credit card in their own name, and 23% reported that they had at least one credit card in their own name and they ...
Sunday, July 7, 2013 at 3:13pm

Statistics/Probability
3. On a given evening, two roommates, roommate A and roommate B, are arguing over who should control the television remote. Roommate A suggests a game of rock-paper-scissors to settle the dispute. It's the first time that the roommates have played each other in rock-paper-...
Sunday, July 7, 2013 at 12:15pm

Statistics/Probability
2. Two roommates, roommate X and roommate Y, are expecting company and are arguing over who should have to wash the dishes before the company arrives. Roommate X suggests a game of rock-paper-scissors to settle the dispute. Consider the game of rock-paper-scissors to be a ...
Sunday, July 7, 2013 at 12:00pm

Statistics/Probability
1. Two roommates, roommate A and roommate B, are about to go cruising with a mutual friend and are arguing over who gets to sit in the front seat. Roommate A suggests a game of rock-paper-scissors to settle the dispute. Consider the game of rock-paper-scissor to be a ...
Sunday, July 7, 2013 at 11:34am

statistics
According to the local real estate board, the average number of days that homes stay on the market before selling is 78.4 with a standard deviation equal to 11 days. A prospective seller selected a random sample of 36 homes from the multiple listing service. Above what value ...
Saturday, July 6, 2013 at 1:39pm

statistics
If I know that a set of test scores has a mean of 75 and a standard deviation of 8 what can I conclude?
Friday, July 5, 2013 at 8:47pm

Statistics
A district mathematics test for all third graders had a normal distribution with a mean of 74 and a standard deviation of 11. What percentage of the third graders tested scored with +1 and -1 standard deviation of the mean?
Friday, July 5, 2013 at 2:12pm

statistics
1. Are there more broken bones in summer or winter? We get records about the number of fractures treated in January and July at a random sample of 25 emergency rooms. The 95% confidence interval for the mean change ( μd = μJan - μJuly )in the numbers of ...
Thursday, July 4, 2013 at 3:54pm

Statistics
The distribution of heights of adult American men is approximately normal with a mean of 68 inches and a standard deviation of 2 inches. What percent of mean are at least 72 inches tall?
Thursday, July 4, 2013 at 3:02pm

statistics
The makers of the MAGNETIZER Engine Energizer System (EES) claim that it improves gas mileage and reduces emissions in automobiles by using magnetic free energy to increase the amount of oxygen in the fuel for greater combustion efficiency. Following are test results, ...
Thursday, July 4, 2013 at 1:07pm

statistics
population with a mean of 110 and a standard deviation of 6, what is the likelihood of a score of 100 or lower
Thursday, July 4, 2013 at 12:31am

statistics
There is a table of AVERAGE monthly temperatures of two different areas of the same city. A scatterplot of the data is made to show that the relationship is linear between the two. If raw data was used instead of the averages to make the scatterplot, the correlation ...
Wednesday, July 3, 2013 at 10:36pm

statistics
A new medication has been created to treat osteo-arthritis inflammation and pain. Doctors prescribing the drug claim that the drug is not as effective for women as men since women taking the medication have higher pain levels than men. The pharmaceutical company conducts a ...
Wednesday, July 3, 2013 at 11:55am

graduate statistics
Does computer-assisted instruction help community college health students with reading difficulties to learn reading skills at a faster than normal rate? A researcher arranged for one of these students to have access to a set of computer-learning programs instead of the normal...
Wednesday, July 3, 2013 at 10:18am

graduate statistics
Do children from lower socioeconomic status (SES) neighborhoods have lower than average test-taking skills? A researcher administered a standard measure of test-taking skills to a randomly chosen child from a low SES neighborhood and found him to have a score of 38. The ...
Wednesday, July 3, 2013 at 10:17am

graduate statistics
A nursing professor was curious as to whether the students in a very large class she was teaching who turned in their tests first scored differently from the overall mean on the test. The overall mean score on the test was 75 with a standard deviation of 10; the scores were ...
Wednesday, July 3, 2013 at 10:17am

Statistics
A test is made of H0: mean = 27 versus H1: mean < 27. The true value of the mean is 27, and H0 is rejected. Is this a Type I error, Type II error, or a correct decision? How do I determine which is which??? Question 4 options: 1) Type II error 2) Type I error 3) Correct ...
Tuesday, July 2, 2013 at 7:30pm

Statistics
Siegel found that elderly people who owned dogs were less likely to pay visits to their doctors after upsetting events than were those who didn’t own pets. Similarly, consider the following hypothetical data. A sample of elderly dog owners is compared to a similar group (...
Tuesday, July 2, 2013 at 6:19pm

Statistics
Two dice are tossed. What is the probability that the sum of both dice is a prime number? This is what I have so far Presuming two fair, 6-sided dice, each numbered 1 through 6: You can achieve one of the following results on any given roll: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12...
Tuesday, July 2, 2013 at 4:31pm

statistics
population mean of 110 and SD of 6, what is likelihood of having score of 100 0r lower
Tuesday, July 2, 2013 at 1:55pm

Statistics
In a recent year, Delaware had the highest per capita annual income with $51,803. If o=$4850, find the mean X that falls at the 95th percentile for a sample of 35 residents.
Tuesday, July 2, 2013 at 10:25am

statistics
how to caculate using a ruler to measure the thickness of a 25 pages in a textbook
Tuesday, July 2, 2013 at 1:04am

statistics
how to caculate using a ruler to measure the thickness of a 25 pages in a textbook
Tuesday, July 2, 2013 at 1:04am

Statistics
A company has developed a new type of light bulb, and wants to estimate its mean lifetime. A simple random sample of 12 bulbs had a sample mean lifetime of 692 hours with a sample standard deviation of 30 hours. It is reasonable to believe that the population is approximately ...
Monday, July 1, 2013 at 7:01pm

Statistics
What critical value for z would be used to test the hypotheses: H0:μ≤10 and Ha:μ>10, for α = 0.05 ?
Monday, July 1, 2013 at 3:06pm

statistics
A senator asks his constituents to rank seven issues in order of importance. How many rankings are possible?
Monday, July 1, 2013 at 12:28pm

statistics
Assuming SAT score data are normally distributed, if only the top 25% of students based on SAT scores qualify to be interviewed for a particular school what would be the minimum score required to have to be interviewed if the population mean is a 1509 and the standard ...
Monday, July 1, 2013 at 7:01am

Statistics
A department store is running a promo one Saturday by giving out coupons for $10 of free merchandise. However, one-third of customers spend $40, and one-third spend$75. The remainder of customers who come in the store do not take advantage of the promo at all. A) find expected...
Sunday, June 30, 2013 at 11:26pm

Business Statistics
Using the telephone numbers listed in your local directory as your population, randomly obtain 20 samples of size 3. From each telephone number identified as a source, take the fourth, fifth, and sixth digits.
Sunday, June 30, 2013 at 7:58pm

Statistics
you are going to test the claim that more than 60% of men refuse to ask for directions when lost. if you use a significance level of .10, what will the critical number be for your rejection region?
Sunday, June 30, 2013 at 5:53pm

psych statistics
Martha believes that a relaxation technique involving visualization will help people with mild insomnia fall asleep faster. She randomly selects a sample of 20 participants from a group of mild insomnia patients and randomly assigns 10 to receive visualization therapy. The ...
Sunday, June 30, 2013 at 5:15pm

college algebra: probability and statistics
You roll a single die once. What is the probability you will roll an odd number or an even number?
Sunday, June 30, 2013 at 3:58pm

Statistics
Many times, we are required to use statistical measures to try and construct a problem. We run a program for a 10 different inputs. The times are measures in 1-second intervals and none of them took 0 secs. a. Suppose the standard deviation of a set of times we run the program...
Sunday, June 30, 2013 at 2:51pm

Statistics
There is a mathematical theory called queuing theory that studies ways in which computer jobs are fed in CPUs and researches on how these can be reduced to a minimum. Show how can a computer estimate the average number of jobs waiting at a queue? Suppose that in a 5 sec ...
Sunday, June 30, 2013 at 2:46pm

Statistics
Can anyone tell me how to use TI-84 calculator to solve this problem??? A company has developed a new type of light bulb, and wants to estimate its mean lifetime. A simple random sample of 12 bulbs had a sample mean lifetime of 692 hours with a sample standard deviation of 30 ...
Saturday, June 29, 2013 at 11:02pm

Statistics
Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = 2.6+.1x (b) Find the ordinates y hat for the points on the line of best fit ...
Saturday, June 29, 2013 at 8:32pm

statistics
a random sample from the population of registered voters in california is to be taken and then surveyed about an upcoming election. What sample size should be used to guarantee a sampling error of 3% or less when estimating p at the 95% confidence level? is this the answer......
Saturday, June 29, 2013 at 6:21pm

statistics
The population (in millions) and the violent crime rate (per 1000) were recorded for 10 metropolitan areas. The data are shown in the following table. Do these data provide evidence to reject the null hypothesis that ƒÏ = 0 in favor of ƒÏ ‚ 0 at...
Saturday, June 29, 2013 at 5:46pm

Statistics
The arena has a policy of selling as many as 16 tickets for a show for which there are only 15 seats available. The manager has noticed in the past that only 88% of people who purchase a ticket annually come for the show. Find the probability that if 16 tickets are sold, not ...
Saturday, June 29, 2013 at 3:33pm

statistics
assume you have a data set from a normally distributed random variable. answer the following: will the random variable be discrete, continuous, or neither? How do you know? I believe its continuous but cant explain why will the data be qualitative or quantitative? How do you ...
Saturday, June 29, 2013 at 1:56pm

statistics
comment on this statement "The mean loss for customers at the first State bank (which is not insured) was $150.00 the standard deviation of the losses was -$125.00"
Friday, June 28, 2013 at 12:22pm

statistics
Randomly selected cans of Coke are measured for the amount of cola in ounces. The sample values listed below have a mean of 12.18 ounces and a standard deviation of 0.118 ounces. Use DataDesk to find a 99% confidence interval for the mean volume of Coke in cans. Show the upper...
Friday, June 28, 2013 at 12:03pm

Statistics.
A person apply for a job in two firms say X&Y, the probability of his been selected in firm X is 0.7, and been rejected in firm Y is 0.5. The probability of atleast 1 of his application been rejected is 0.6. What is the probability he will be selected in one of the two firms.
Friday, June 28, 2013 at 3:30am

statistics
n youth corp have to stand in a row if all possible permutations;are equally likely. Fine the probability that 2 particular corp members stand side by side.
Friday, June 28, 2013 at 3:16am

statistics
Politicians are interested in knowing the opinions of their constituents on important issues. One administrative assistant to a senator claims that more than 63% of adult women favor stricter gun laws. A recent telephone survey of 1026 adults by IBR Polls found that 65.9% of ...
Thursday, June 27, 2013 at 7:25pm

statistics
Which of the following criteria must be met to do a one-sample test for a proportion? A. The data values in the sample must be independent. B. The parent population must be normally distributed. C. The data must come from a random sample. D. The sample size must be more than ...
Thursday, June 27, 2013 at 6:34pm

Statistics
Politicians are interested in knowing the opinions of their constituents on important issues. One administrative assistant to a senator claims that more than 63% of adult women favor stricter gun laws. A recent telephone survey of 1026 adult women by IBR Polls found that 65.9...
Thursday, June 27, 2013 at 5:55pm

Statistics
Politicians are interested in knowing the opinions of their constituents on important issues. One administrative assistant to a senator claims that more than 63% of adult women favor stricter gun laws. A recent telephone survey of 1026 adults by IBR Polls found that 65.9% of ...
Thursday, June 27, 2013 at 5:52pm

statistics & probability
according to a survey, 30% of 18-25 year olds have blue eyes. In a random sample of 8 people in this age group what is the probability that exactly 0 have blue eyes?
Thursday, June 27, 2013 at 2:03am

Statistics
If 1000 raffle tickets were sold for a TV prize that is worth $275 and a ticket number is drawn to determine the winner, what is the expected value of the raffle?
Thursday, June 27, 2013 at 12:09am

Statistics Help
Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (b) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4 = ì...
Wednesday, June 26, 2013 at 8:49pm

Statistics
A simple random sample of 10 households, the number of TV's that each household had is as follows: 1, 3, 1, 2, 0, 2, 1, 1, 1, 5 Assume that it is reasonable to believe that the population is approximately normal and the population standard deviation is 0.56. What is the ...
Wednesday, June 26, 2013 at 2:25pm

statistics
2. The manager of a sandwich shop gathers data on what people spend on lunch on a particular day of the week. The results are $4.20, $4.22, $2.35, $4.32, $5.25, $6.48, $6.78, $8.59, $6.95, $5.52, $6.83, $7.35, $4.36, $9.39, $6.42. To the degree that this represents the ...
Wednesday, June 26, 2013 at 1:52pm

Statistics
A college admissions officer takes a simple random sample of 103 entering freshmen and computes their mean mathematics SAT score to be 493. Assume the population standard deviation is 112. What is the lower bound of the 99% confidence interval? Round your answer to the nearest...
Wednesday, June 26, 2013 at 9:30am

statistics
A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard ...
Wednesday, June 26, 2013 at 5:10am

statistics
A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard ...
Wednesday, June 26, 2013 at 4:16am

statistics
A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard ...
Wednesday, June 26, 2013 at 4:15am

statistics
A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard ...
Wednesday, June 26, 2013 at 4:09am

Statistics check
Complete the hypothesis test with alternative hypothesis ƒÊd ‚ 0 based on the paired data that follows and d = O - Y. Use ƒ¿ = 0.01. Assume normality. Oldest 188 174 192 196 65 Youngest 186 168 199 199 69 (a) Find t. (Give your answer correct ...
Tuesday, June 25, 2013 at 8:00pm

statistics
Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4 = ì...
Tuesday, June 25, 2013 at 7:54pm

Statistics
Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321
Tuesday, June 25, 2013 at 7:52pm

statistics
The mean loss for customers at the first State bank (which is not insured) was $150.00 the standard deviation of the losses was -$125.00
Tuesday, June 25, 2013 at 5:08pm

statistics
the mean loss for customers at first state bank (which was not insured) was $150. The standard deviation of the losses was -$125
Tuesday, June 25, 2013 at 3:21pm

statistics
According to Advertising Age, the average base salary for women working as copywriters is $66,000. Assume that the salaries are normally distributed and that the standard deviation is $7,500. a. What is the probability of a woman receiving a salary between $60,000 and $75,000...
Tuesday, June 25, 2013 at 12:31pm

statistics
The Stop N’ Go convenience chain recently selected a random sample of 10 customers. The store monitored the number of times each customer made a purchase at the store over a two-month period. The following data were collected:
Tuesday, June 25, 2013 at 12:21pm

statistics help
Complete the hypothesis test with alternative hypothesis ƒÊd ‚ 0 based on the paired data that follows and d = O - Y. Use ƒ¿ = 0.01. Assume normality. Oldest 188 174 192 196 65 Youngest 186 168 199 199 69 (a) Find t. (Give your answer correct ...
Monday, June 24, 2013 at 10:28pm

statistics
Could someone work a problem like this one, for an example. Complete the hypothesis test with alternative hypothesis ìd < 0 based on the paired data that follow and d = M - N. Use á = 0.02. Assume normality. M 49 67 45 57 57 48 N 57 68 47 60 64 55 (a) Find t...
Monday, June 24, 2013 at 5:39pm

statistics
6. According to the records of Enersource, an electric company serving the Mississauga area, the mean electricity consumption for all households during winter is 1650 kilowatt-hours per month. Assume that the monthly electricity consumption during winter by all households in ...
Sunday, June 23, 2013 at 9:51pm

statistics
The pucks used by the National Hockey League for ice hockey must weigh between 5.5 and 6.0 ounces. Suppose the weights of pucks produced at a factory are normally distributed with a mean of 5.75 ounces and a standard deviation of 0.11 ounce. What percentage of the pucks ...
Sunday, June 23, 2013 at 9:51pm

statistics
Page 1 of 2 4. Despite all efforts by the quality control department, the fabric made at Benton Corporation always contains a few defects. A certain type of fabric made at this corporation contains an average of .5 defects per 500 yards. Using the Poisson formula, find the ...
Sunday, June 23, 2013 at 9:51pm

statistics
3. Magnetic resonance imaging (MRI) is a process that produces internal body images using a strong magnetic field. Some patients become claustrophobic and require sedation because they are required to lie within a small, enclosed space during the MRI test. Suppose 29% of all ...
Sunday, June 23, 2013 at 9:50pm

statistics
2. Bender electronics buys keyboards for its computers from another company. The keyboards are received in shipments of 100 boxes, each box containing 20 keyboards. The quality control department at Bender Electronics first randomly selects one box from each shipment and then ...
Sunday, June 23, 2013 at 9:50pm

Statistics
1. Let x be the number of heads obtained in two tosses of a coin. The following table lists the probability distribution of x. x 0 1 2 P(x) .25 .50 .25 Calculate the mean and standard deviation of x. Give a brief interpretation of the value of the mean.
Sunday, June 23, 2013 at 9:49pm

statistics check
The computer-science aptitude score, x, and the achievement score, y (measured by a comprehensive final), were measured for 10 students in a beginning computer-science course. The results were as follows. (Give your answers correct to two decimal places.) x 7 10 19 9 20 22 6 ...
Sunday, June 23, 2013 at 8:41pm

statistics check
Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 1 7 2 1 0 4 2 y 1 7 3 3 6 6 5 0 6 2 (b) Calculate the covariance. (Give your answer correct to two decimal places.) 5.35 was my answer . (c) Calculate sx and sy. (Give your answers correct to three ...
Sunday, June 23, 2013 at 7:45pm

statistics
According to the Journal of the American Medical Association, the doctors found that in the week before and the week after Thanksgiving, there were 12,000 total deaths and 6062 of them occurred in the week before Thanksgiving. Construct a 95% confidence interval of the ...
Sunday, June 23, 2013 at 5:01pm

statistics
The National Highway Traffic Safety Administration analyzes the crash test data for new cars. One variable measured is the severity of the injury due to a collision. The higher the severity, the higher the points assigned. Assume that the injury rating is normally distributed ...
Sunday, June 23, 2013 at 5:00pm

Statistics
According to the American Automobile Association (AAA), the mean cost of a gallon of regular unleaded fuel in 2007 was $2.835. AAA noted that the standard deviation of the fuel price was $0.15. A random sample of n=100 gas stations is selected and the mean gas price is ...
Sunday, June 23, 2013 at 5:00pm

statistics
Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4, with n...
Sunday, June 23, 2013 at 2:08pm

statistics
the probability that a football game will go into overtime is 17%. In 240 randomly selected football games, what is the mean and the standard deviation of the number that went into overtime
Sunday, June 23, 2013 at 9:00am

statistics
Consider the following table and use the formulas that are given for computing the correlation coefficient. (Give your answer correct to two decimal places.) x 1 1 0 0 0 y 7 3 5 6 6 r = n xy − x y n x2 − x 2 n y2 − y 2 (1) r = SS(xy) SS(x) · SS(y) (2) ...
Sunday, June 23, 2013 at 12:06am

statistics
Consider the following set of data. (18, 12), (29, 48), (65, 29), (82, 24), (115, 56), (124, 13) (a) Calculate the covariance of the set of data. (Give your answer correct to two decimal places.) . (b) Calculate the standard deviation of the six x-values and the standard ...
Sunday, June 23, 2013 at 12:04am

statistics
Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 1 7 2 1 0 4 2 y 1 7 3 3 6 6 5 0 6 2 (b) Calculate the covariance. (Give your answer correct to two decimal places.) (c) Calculate sx and sy. (Give your answers correct to three decimal places.) sx = sy...
Sunday, June 23, 2013 at 12:03am

statistics
The customer bills in a family restaurant are normally distributed. The bills mean is $28 and has a standard deviation of $6. a. Identify what the random variable you are measuring is in this problem. b. What is the probability that a randomly selected bill will be at least $...
Saturday, June 22, 2013 at 2:15pm

statistics
What is your conclusion based on the following data? A survey was conducted to study the effects of weight loss from a low fat diet. Two random samples of 100 people each were selected. One group was put on the low fat diet and the other group on the regular diet. The weight ...
Saturday, June 22, 2013 at 1:21pm

statistics
Set up the null and alternative hypothesis for the following problem. A survey reported the planning habits of men and women. The question asked, "how do you primarily keep track of meetings, appointments and deadlines?" 56% of men and 46% of women answered, "in...
Saturday, June 22, 2013 at 1:19pm

statistics
Calculate p ̅. x1 20 n1 50 x2 55 n2 100
Saturday, June 22, 2013 at 1:18pm

statistics
A store manager claims that the average age of his customers is less than 40 years old, while the industry average is 40 years old. He asks you to test his thinking. You collect a sample of 50 customers and found that the average age is 38.7. Assuming that the population ...
Saturday, June 22, 2013 at 1:17pm

statistics
How is the P-value used to determine whether or not to reject the null hypothesis?
Saturday, June 22, 2013 at 1:17pm

Statistics
There were two independent groups who took a school course by different modes. The first sample of students took the course in the online and the second sample took the course in the conventional face to face mode. Using the sample data determine if there is significant ...
Saturday, June 22, 2013 at 4:41am

statistics
If a teacher wants to test her belief that more than 5 students in college classes typically receive A as a grade, she'll perform? a. two tailed testing of a mean b. two tail testing of a proportion c. one tail testing of a proportion d. one tail testing of a mean I choose...
Friday, June 21, 2013 at 6:03pm

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