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Unformatted text preview: ChiSquare Tests and Nonparametric Tests 123 CHAPTER 12: CHISQUARE TESTS AND NONPARAMETRIC TESTS 1. When testing for independence in a contingency table with 3 rows and 4 columns, there are ________ degrees of freedom. a) 5 b) 6 c) 7 d) 12 ANSWER: b TYPE: MC DIFFICULTY: Easy KEYWORDS: Chisquare test of independence, degrees of freedom 2. If we use the 2 method of analysis to test for the differences among 4 proportions, the degrees of freedom are equal to: a) 3 b) 4 c) 5 d) 1 ANSWER: a TYPE: MC DIFFICULTY: Easy KEYWORDS: Chisquare test for difference in proportions, degrees of freedom 3. If we wish to determine whether there is evidence that the proportion of successes is the same in group 1 as in group 2, the appropriate test to use is a) the Z test. b) the 2 test. c) Both a) and b). d) Neither a) nor b). ANSWER: c TYPE: MC DIFFICULTY: Easy KEYWORDS: Chisquare test for difference in proportions 4. In testing a hypothesis using the 2 test, the theoretical frequencies are based on the a) null hypothesis. b) alternative hypothesis. c) normal distribution. d) None of the above. ANSWER: a TYPE: MC DIFFICULTY: Easy 124 ChiSquare Tests and Nonparametric Tests KEYWORDS: Chisquare test for difference in proportions, Chisquare test of independence, properties TABLE 121 A study published in the American Journal of Public Health was conducted to determine whether the use of seat belts in motor vehicles depends on ethnic status in San Diego County. A sample of 792 children treated for injuries sustained from motor vehicle accidents was obtained, and each child was classified according to (1) ethnic status (Hispanic or nonHispanic) and (2) seat belt usage (worn or not worn) during the accident. The number of children in each category is given in the table below. Hispanic NonHispanic Seat belts worn 31 148 Seat belts not worn 283 330 5. Referring to Table 121, which test would be used to properly analyze the data in this experiment? a) 2 test for independence b) 2 test for differences among more than two proportions c) Wilcoxon rank sum test for independent populations d) McNemar test for the difference between two proportions ANSWER: a TYPE: MC DIFFICULTY: Moderate KEYWORDS: Chisquare test of independence, 6. Referring to Table 121, the calculated test statistic is a)0.9991 b)0.1368 c) 48.1849 d) 72.8063 ANSWER: c TYPE: MC DIFFICULTY: Easy KEYWORDS: Chisquare test of independence, test statistic 7. Referring to Table 121, at 5% level of significance, the critical value of the test statistic is a) 3.8415 b) 5.9914 c) 9.4877 d) 13.2767 ANSWER: a TYPE: MC DIFFICULTY: Easy KEYWORDS: Chisquare test of independence, critical value 8. Referring to Table 121, at 5% level of significance, there is sufficient evidence to conclude that ChiSquare Tests and Nonparametric Tests 125 a) use of seat belts in motor vehicles is related to ethnic status in San Diego County....
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This note was uploaded on 10/15/2010 for the course BUS 30.2 taught by Professor Reich during the Fall '07 term at CUNY Brooklyn.
 Fall '07
 Reich

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