Unformatted text preview: be
used in the chisquare test of independence.
A. 10.9, 25.1
B. 10.0, 26.0
C. 18.0, 18.0
D. 39.4, 102.6 11070 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 2year institutions that
will be used in the chisquare 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 11071 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 chisquare 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 11072 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 chisquare statistic for this test of independence.
A. 3.84
B. 4.76
C. 1.50
D. 19.04 11073 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 11074 Chapter 01  An Introduction to Business Statistics Chapter 12 ChiSquare 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: ChiSquare 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: ChiSquare 11075 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: ChiSquare 4. The chisquare 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: ChiSquare 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: ChiSquare 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: ChiSquare 11076 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: ChiSquare 8. One use of the chisquare 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: ChiSquare 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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 Winter '14

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