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The following data show samples of three chain stores in three different locations in one town and the amount of dollars spent per customer per visit. At the 0.05 level, is there a difference among the means?
Store A Store B Store C
30 42 30
14 28 14
22 20 20
18 35 16
26 49 15
25 28
36
24
Given this information, what would sampling error be if sample including seven values in top row were used to calculate sample mean?
Dr Johnson wants to know if there is sufficient evidence to conclude that the grade distribution of his class is different than the historical grade distribution. Use a =.05 and .01 and perform a goodness of fit test.
Choose any Statistic business problem and develop a problem statement which can be addressed with survey research. Prepare a 10-13 question survey to collect primary data regarding your selected problem statement.
Based on the sample findings, estimate the true mean of Saturday sales with 90% probability.
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
Prepare a frequency distribution from data given below that describes how long it took a person to drive to work in work week.
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.
Jamie expects that a bulb will last for 400 to 500 days, what is the probability of an Acme bulb satisfying that?
Let X be the random variable which denotes the number of saves that are made by the lacrosse goalie. Find the expected value and standard deviation of the random variable.
Why might driver be tempted not to use seat belt "just on this trip"?
A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative action programs for women and minorities for admissions to colleges and universities.
Four properties are randomly selected from each neighborhood and the ratios recorded for each as follows:
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