Select the best XLSTAT printout to answer each question. Required conditions have been met for each question. A significance level of ? = 0.05 is used for each hypothesis test and a confidence level of 95% is used for each confidence interval estimate. Your solution should be this document with all the blanks filled in.

1. A random sample of people who work regular 9-5 hours and a random sample of people who work shifts were asked how many hours of sleep they get per day on average. An appropriate F-test was performed and it was found that the null hypothesis of the F-test should be rejected. Can we infer that there is a difference in the number of hours people sleep depending on whether they work 9-5 or shifts? Printout # ___________________ ?0: ________________________ ?1: ________________________ p-value: _____________

Conclusion: Accept ?0 Reject ?0 2.

Two industrial printers were each made to print 12 different manuscripts and the number of printing errors was recorded for each run. Can we infer that one printer makes more errors than the other? Printout # ___________________ ?0: ________________________ ?1: ________________________ p-value: _____________ Conclusion: Accept ?0 Reject ?0

ADMN 2606 Quiz 4 3. A random sample of a city was polled about who they supported in the upcoming election for mayor: Candidate A or Candidate B. Estimate the difference between the level of support for Candidate A and Candidate B. Printout # ___________________ LCL: _____________________ UCL: _____________________

4. A grocery store wants to know whether two banana suppliers differ in the average number of rotten bananas per case. Test to see whether an equal variance test or an unequal variance test should be run. Printout # ___________________ ?0: ________________________ ?1: ________________________ p-value: _____________ Conclusion: Accept ?0 Reject ?0

5. A random sample of Canadians from B.C., Alberta, Saskatchewan and Manitoba were asked how much they spend on organic vegetables per week. Can we infer that differences exist in the amount of money people from each of the four provinces spend on organic vegetables per week? Printout # ___________________ ?0: ________________________ ?1: ________________________ p-value: _____________ Conclusion: Accept ?0 Reject ?0

ADMN 2606 Quiz 4

6. A large law firm employs lawyers of 5 different specialties. The firm wanted to determine whether the number of billable hours per month is different for each type of lawyer. To do so, they recorded the number of billable hours per month for a sample of lawyers in the firm, making sure to include lawyers of each specialty in the sample. Data was collected for a number of months. The firm thought that the number of years in practice would have an effect on billable hours, so the lawyers were blocked by number of years in practice. a) Can we infer that there are differences in the number of billable hours per month depending on the specialty of the lawyer? Printout # ___________________ ?0: ________________________ ?1: ________________________ p-value: _____________ Conclusion: Accept ?0 Reject ?0 b) Was blocking by number of years in practice appropriate for this study? Why or why not?

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