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A shoe salesman want to see if his female customers have a preference in the color of shoe purchased. What is the test value for the following data?
Black Brown Red Navy White
48 32 13 18 23
How large a sample is required to estimate the mean speed with a margin of error equal to 2 miles per hour with 90% confidence?
In an article in Accounting and Business Research, Carslaw and Kaplan investigate factors that in?uence "audit delay" for ?rms in New Zealand.
A statistics practitioner conducted a two-factor analysis of variance experiment with a =4, b = 3, and r = 8. The sum of squares are listed here:
Describe what assumptions must be met to use this test. Finally, where in your course project data set might you employ a paired t-Test?
A professor is targeting a score of 80 on an exam. His forty-nine students averaged 78 on an exam with s = 7. Are the scores significantly less than 80 at a significance level of 0.05? Show your work and state the conclusion.
Suppose that you are purchasing cases of wine and that periodically you select a test case to determine the adequacy of the bottles' seals. To do this you randomly select and test 3 bottles int he case.
Which measure of association do you use to compare the relationship between these variables? Why?
Which statistical analysis technique should be used? What is the null hypothesis? Can an analysis be performed? Why or why not?
Specification limits for a particular characteristic of a product indicate the values at which the product will operate properly. Assume we have a product with an upper specification limit of 7.25 and a lower specification limit of 4.0. As long as..
A particular medical operation proves fatal in 1% of the cases. Find an approximation to the probability that there will be at least 2 fatalities in 200 operations.
Identify a research issue, problem, or opportunity that uses data that has absolute zero measurements, ratio level data.
Find the test statistic value for testing the equality of population means of the two samples.
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