# Type of test 1 6 2 ho 3 ha 4 7 5 requirements test

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Type of test __________________________________ 1. 6. 2. Ho: 3. Ha: 4. 7. 5. Requirements: Test statistic ________ P value _______ Reject/fail to reject _____________ Conclusion:___________________________________________________________________________ _____________________________________________________________________________________ Salesperson A B C D E F With bonus 2900 3000 5800 4400 5300 5600 w/out bonus 2800 2500 5900 3500 4600 4600

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5. In 1975, a random sample of 1484 adult U.S. citizens was surveyed, and 193 strongly agreed with the statement, People should take care of themselves . Then in 1991, a survey of 1013 adult U.S. citizens showed that only 61 strongly agreed with the statement. Does this indicate that the proportion of U.S. adults who strongly agree with the given statement has dropped? Type of test __________________________________ 1. 6. 2. Ho: 3. Ha: 4. 7. 5. Requirements: Test statistic ________ P value _______ Reject/fail to reject _____________ Conclusion:___________________________________________________________________________ _____________________________________________________________________________________ 6. A statistics professor has been teaching first and second semester statistics for five years. She wants to know if the grades in her first semester classes differ significantly from those of her second semester classes. She takes a random sample of final grades from her two most recent first and second semester classes and gets these data: 1 st Sem: 89, 98, 78, 86, 95, 83, 90, 87, 85, 80, 96, 93, 90, 91, 81, 87, 93, 90, 87, 88 2 nd Sem: 87, 85, 89, 78, 79, 77, 82, 90, 91, 93, 88, 87, 86, 83, 85, 81, 90, 86, 86, 84 Is there convincing evidence that first semester grades and second semester grades differ significantly? Type of test __________________________________ 1. 6. 2. Ho: 3. Ha: 4. 7. 5. Requirements: Test statistic ________ P value _______ Reject/fail to reject _____________ Conclusion:___________________________________________________________________________ _____________________________________________________________________________________
7. Reading Nook Bookstore has 750 retail outlets across the country. The sales director wanted to see if Christmas music affects book sales in December. She randomly assigned some of the outlets to pipe in music and others not to. Then sales records for the month of December were kept. The results are shown in below. Is there convincing evidence that there is an association between sales and Christmas music? Type of test __________________________________ 1. 6. 2. Ho: 3. Ha: 4. 7. 5. Requirements: Test statistic ________ P value _______ Reject/fail to reject _____________ Conclusion:___________________________________________________________________________ _____________________________________________________________________________________ 8. The following is based on information taken from Winter Wind Studies in Rocky Mountain National Park, by Glidden. At five weather stations on Trail Ridge Road in Rocky Mountain National Park, the

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