Spring2003FinalA

# Spring2003FinalA - COURSE MSCI 3710 Print Name Final Exam...

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I. Use the information given in the paragraph below to answer the next four questions. (Kvanli Chapter 8) Historically, the time spent by MCSI3710 students on trying to certify any AIBS homework is known to have a mean of 29 minutes. In order to examine the claim that Homework 10.1 was actually less time consuming, an instructor asked a 10 students how much time they spent on it. Their times had a mean of 23 minutes and a standard deviation of 11 minutes. Conduct the appropriate hypothesis test, at the 5% significance level. 1. What are the null hypothesis and alternative hypothesis for this test? A. Ho: μ = 29 vs. Ha: ≠ 29 B. Ho: > 29 vs. Ha: < 29 * C. Ho: = 23 vs. Ha: ≠ 23 D. Ho: < 29 vs. Ha: > 29 E. Ho: < 23 vs. Ha: < 23 2. What kind of test statistic should be used in this case? A. z B. t * C. X 2 D. p E. F 3. The decision rule is to reject Ho if the computed test statistic is: A. > 1.833 B. < –2.262 C. < –1.645 D. < –1.833 * E. < –1.96 4. Assuming the calculated value of the test statistic is –1.56 , what is the conclusion of the test? A. Reject the null hypothesis. There is sufficient evidence that the new mean is less than 29 minutes. B. Fail to reject the null hypothesis. There is sufficient evidence that the new mean is less than 29 minutes. C. Fail to reject the null hypothesis. There is insufficient evidence that the new mean is less than 23 minutes. D.
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Spring2003FinalA - COURSE MSCI 3710 Print Name Final Exam...

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