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On the most recent tax cut proposal a random sample

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Unformatted text preview: be used in the chi-square test of independence. A. 10.9, 25.1 B. 10.0, 26.0 C. 18.0, 18.0 D. 39.4, 102.6 1-1070 Chapter 01 - An Introduction to Business Statistics 89. At a recent meeting of educational researchers, comparisons were made between the type of college freshmen attend and the numbers who drop out. A random sample of freshmen shows the following results: Determine the expected frequencies for the freshmen who drop out of 2-year institutions that will be used in the chi-square test of independence. A. 15.0, 9.0 B. 10.0, 10.9 C. 18.0, 18.0 D. 11.7, 92.6 90. At a recent meeting of educational researchers, comparisons were made between the type of college freshmen attend and the numbers who drop out. A random sample of freshmen shows the following results: At a significance level of .05, determine the appropriate degrees of freedom and the rejection point condition for this test. A. 6, 4.80 B. 7, 14.1 C. 4, 9.49 D. 3, 7.81 1-1071 Chapter 01 - An Introduction to Business Statistics 91. At a recent meeting of educational researchers, comparisons were made between the type of college freshmen attend and the numbers who drop out. A random sample of freshmen shows the following results: Calculate the chi-square statistic for this test of independence. A. 7.81 B. 4.80 C. 2.50 D. 6.67 92. At a recent meeting of educational researchers, comparisons were made between the type of college freshmen attend and the numbers who drop out. A random sample of freshmen shows the following results: Use a significance level of .05 and determine if the type of school and the drop rate are independent (null hypothesis is that dropout rate is independent of type of school) A. Reject H0 B. Fail to reject H0 1-1072 Chapter 01 - An Introduction to Business Statistics 93. In a study of car accidents and drivers who use cell phones, the following sample data are collected: Determine the expected frequencies those who had accidents in the last year to use for the chisquare test of independence. A. 23.0, 46.0 B. 27.8, 41.2 C. 189.5, 189.5 D. 34.5, 34.5 94. In a study of car accidents and drivers who use cell phones, the following sample data are collected: At a significance level of 0.05, determine the appropriate degrees of freedom and the rejection point condition for the test. A. 1, 3.84 B. 4, 9.49 C. 2, 5.99 D. 3, 7.81 95. In a study of car accidents and drivers who use cell phones, the following sample data are collected: Calculate the chi-square statistic for this test of independence. A. 3.84 B. 4.76 C. 1.50 D. 19.04 1-1073 Chapter 01 - An Introduction to Business Statistics 96. In a study of car accidents and drivers who use cell phones, the following sample data are collected: Use a significance level of 0.05 and determine if the use of a cell phone and having an auto accident are independent (null hypothesis is they are independent). A. Reject H0 B. Fail to reject H0 1-1074 Chapter 01 - An Introduction to Business Statistics Chapter 12 Chi-Square Tests Answer Key True / False Questions 1. A contingency table summarizes data that has been classified on two dimensions or scales. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 1 Topic: Chi-Square 2. The actual counts in the cells of a contingency table are referred to as the expected cell frequencies. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 1 Topic: Chi-Square 1-1075 Chapter 01 - An Introduction to Business Statistics 3. The χ2 goodness of fit test requires nominative level of data. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Hard Learning Objective: 1 Topic: Chi-Square 4. The chi-square distribution is a continuous probability distribution that is skewed to the left. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 1 Topic: Chi-Square 5. Expected cell frequencies for a multinomial distribution are calculated by assuming statistical dependence. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 1 Topic: Chi-Square 6. A multinomial probability distribution describes data that is classified into two or more categories when a multinomial experiment is carried out. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Learning Objective: 1 Topic: Chi-Square 1-1076 Chapter 01 - An Introduction to Business Statistics 7. The trials of a multinomial probability are assumed to be dependent. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 3 Topic: Chi-Square 8. One use of the chi-square goodness of fit test is to determine if specified multinomial probabilities in the null hypothesis is correct. TRUE AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Easy Learning Objective: 1 Topic: Chi-Square 9. In a contingency table, when all the expected frequencies equal the observed frequencies the calculated χ2 statistic equals zero. TRUE AACSB: Refl...
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