Spring2003FinalA

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

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COURSE: MSCI 3710 Print Name: Final Exam Signature: Version A S.S.#: Spring 2003Seat Number: Note: Whenever question(s) are connected you may be asked to assume a result (given a value) from the previous question but this result may or may not be correct. This is to prevent you from losing points on a second question because you made a mistake on a previous question. Instructions: n Please print your name, social security number, and seat number on this exam. Also, put your signature on this exam. l On your scantron PRINT your name, your version, and your seat number. To better protect your privacy also print your name on the back side of your scantron. l You have 105 minutes to complete this exam. The exam is open book, open notes, and open mind. You may use any type of calculator but please show all your work on the exam and mark all answers on the scantron. l Many of the questions follow the format of those in Adventures in Business Statistics. The remaining questions are either based on the Excel assignment or use an Adventures-like approach with problems nearly identical to those assigned in the textbook. l When you have completed the exam, please insert your scantron into the exam booklet and turn them into your instructor. l No cheating. l Good luck and we wish you well on the exam. 1
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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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