sample_problem_set

# sample_problem_set - Sample Statistical Problems For each...

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Sample Statistical Problems For each problem, identify your hypotheses, calculate the test statistic and draw a conclusion. Answers are provided in a separate document on Blackboard. 1. The president of a local furniture store had promised store managers a bonus of 8% if the average weekly sales per sales associate was significantly greater than \$300. A random sample of 12 stores yielded the following results. Perform the appropriate test using an alpha of .05 and determine whether managers deserve a bonus. Store Weekly sales per sales associate 1. \$320 2. \$230 3. \$400 4. \$450 5. \$280 6. \$320 7. \$380 8. \$280 9. \$420 10. \$360 11. \$440 12. \$320 What is the amount of sampling error for this problem.

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2. A sampling of the past 42 years indicates that there is a correlation of .45 between the weather we have in the D.C. area during the month of April and the weather we experience in the summer months. Test the significance of this correlation using an alpha of .05. What does the result tell you about what our weather will be like this summer? What is the probability of making a Type I error in this case? What is a Type I error?
3.

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