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Unformatted text preview: Name: _______________KEY___________________________ 7 May 2009 IE330 Spring 2009 Final Exam B Part 1: Mandatory No calculators, closed book, closed notes. Do not tear off any pages. 1 of 24 Name: _______________KEY___________________________ 1. CHAPTER 15  True/False questions (3 points each, 15 points total) a. ( TRUE or FALSE) In a Wilcoxon ranksum test, the populations must have the same shape and spread for the test to be valid. b. ( TRUE or FALSE) A KruskalWallis test could be used in place of a one factor ANOVA when there is nonconstant variance between the levels of the factor. c. ( TRUE or FALSE) To conduct a Wilcoxon signedrank test, the distribution must be symmetric. d. ( TRUE or FALSE) When conducting a sign test, values that are tied with the hypothesized value should be thrown out. e. (TRUE or FALSE) The sign test should not be used when there are many outliers in the set of data. 2. CHAPTER 15  Multiple choice questions (3 points each, 15 points total) a. Which of the following could be used to construct a 95% confidence interval on the median when the data is not normally distributed? i. Ztest ii. Sign test iii. KruskalWallis test iv. Wilcoxon signedrank test v. None of the above b. You are testing whether H0: = 3.5 vs H1: 3.5, but the population is not normally distributed. Which of the following nonparametric tests could you use to conduct the same (or a similar) test (choose all that could be used)? i. Paired test ii. Sign test iii. Wilcoxon ranksum test iv. Wilcoxon signedrank test v. None of the above c. You are conducting a twofactor ANOVA, but find the data is not normally distributed. Which of the following nonparametric tests should you conduct instead? i. 2 2 factorial test ii. Regression iii. KruskalWallis test iv. Wilcoxon signedrank test v. None of the above 2 of 24 Name: _______________KEY___________________________ d. Which of the following nonparametric tests are more powerful than their parametric equivalent when the parametric assumptions have been met (choose all that are correct)? i. Wilcoxon signedrank test ii. Wilcoxon ranksum test iii. Sign test iv. KruskalWallis test v. None of the above e. Which of the following are true concerning the sign test (choose all that are true)? i. The test compares the data against a hypothesized median ii. The data should be free of outliers iii. The counts of values above and below the median are compared. iv. The data should come from a uniform distribution v. None of the above 3. CHAPTER 16  True/False questions (3 points each, 15 points total) a. (TRUE or FALSE) During monitoring of a process using statistical process control, having even one point outside the control limits indicates an outofcontrol process....
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 Spring '11
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