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05 what do you conclude a reject the null hypothesis

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Unformatted text preview: before the protocol has shifted to the left of the probability distribution of the test scores after the protocol. C. H0: The probability distribution of test scores before the protocol has shifted to the right of the probability distribution of the test scores after the protocol. D. H0: The probability distribution of test scores before the protocol has shifted to the left or right of the probability distribution of the test scores after the protocol. 1-1796 Chapter 01 - An Introduction to Business Statistics 97. A study was conducted to investigate the effect of an intervention protocol on IQ tests. Nine randomly selected students were tested. Calculate T- and T+ A. 44, 1 B. 38.5, 6.5 C. 45.5, 2.5 D. 32.5, 12.5 98. A study was conducted to investigate the effect of an intervention protocol on IQ tests. Nine randomly selected students were tested. What is the rejection point T0 for A. 8 B. 6 C. 4 D. 6.5 = .05? 1-1797 Chapter 01 - An Introduction to Business Statistics 99. A study was conducted to investigate the effect of an intervention protocol on IQ tests. Nine randomly selected students were tested. At = .05, test to determine if the protocol increases test scores. A. Reject the null hypothesis B. Fail to reject the null hypothesis 100. A readability analysis is conducted to determine how easy four different newspapers are to read for the average citizen. The sample scores are below: Calculate H A. 20.00 B. 14.95 C. 11.345 D. 12.06 1-1798 Chapter 01 - An Introduction to Business Statistics 101. A readability analysis is conducted to determine how easy four different newspapers are to read for the average citizen. The sample scores are below: At the = .01 level of significance, test the claim that the four newspapers have the same readability level. A. Reject the null hypothesis B. Fail to reject the null hypothesis 102. For eight randomly selected states, the following table lists the per capita beer consumption (in gallons) and the per capita wine consumption (in gallons) Calculate the rank correlation coefficient when beer consumption = x and wine consumption =y A. rs = .506 B. rs = .703 C. rs = .711 D. rs = .494 1-1799 Chapter 01 - An Introduction to Business Statistics 103. For eight randomly selected states, the following table lists the per capita beer consumption (in gallons) and the per capita wine consumption (in gallons) Test H0: ps = 0 vs HA: ps > 0 for the relationship between beer consumption and wine consumption at the state level at α = .05. A. Reject the null hypothesis B. Fail to reject the null hypothesis 1-1800 Chapter 01 - An Introduction to Business Statistics Chapter 18 Nonparametric Methods Answer Key True / False Questions 1. A sign test is a test of hypothesis about the population mean. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 1 Topic: Sign Test 2. Nonparametric tests can be more powerful than the corresponding t or F tests if the population distribution is highly skewed or nonnormal. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 1 Topic: Nonparametric methods 1-1801 Chapter 01 - An Introduction to Business Statistics 3. The Wilcoxon signed rank test is a nonparametric test. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 3 Topic: Signed Rank 4. The Wilcoxon rank sum test is a nonparametric test used to compare the central tendencies of two populations when a paired difference experiment has been conducted. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Hard Learning Objective: 2 Topic: Rank Sum 5. The Wilcoxon signed rank test is also called the Mann-Whitney test. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 3 Topic: Signed Rank 1-1802 Chapter 01 - An Introduction to Business Statistics 6. The Wilcoxon rank sum test and the Kruskal Wallis test both require that we take independent random samples. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 3 Learning Objective: 4 Topic: Rank Sum & Kruskal Wallis 7. Parametric tests such as F and t tests are more powerful then their nonparametric counterparts, if the assumptions needed to perform the parametric test are not violated. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Hard Learning Objective: 1 Topic: Nonparametric methods 8. If you have a paired data that consists of matched pairs collected from two dependent populations then Wilcoxon signed rank test may be appropriate to use. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 3 Topic: Signed ranks 9. A parametric test is always more powerful than its nonparametric counterpart. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 1 Topic: Nonparametric methods 1-1803 Chapter 01 - An Introduction to Business Statistics 10. An assumption of the Wilcoxon rank sum test is t...
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This document was uploaded on 01/20/2014.

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