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Unformatted text preview: . means B. test statistic C. degrees of freedom D. variation AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 4 Topic: Paired differences 61. If we are testing the hypothesis about the mean of a population of paired differences with samples of n1 = 10, n2 = 10, the degrees of freedom for the t statistic is ____. A. 20 B. 9 C. 18 D. 10 AACSB: Reflective Thinking Bloom's: Application Difficulty: Medium Learning Objective: 4 Topic: Paired differences 62. Parameters of the F distribution include: A. n1 B. degrees of freedom C. n2 D. A and C E. None of the above AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 6 Topic: Two population variances 1-881 Chapter 01 - An Introduction to Business Statistics 63. In testing the equality of population variance, what assumption(s) should be considered? A. Independent samples B. Equal sample sizes C. Normal distribution of the populations D. A and B E. A and C AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 7 Topic: Two population variances 64. When testing H0: σ12 ≤ σ22 HA: σ12> σ22 where s12 = .004, s22 = .002, n1 = 4, n2 = 7 at α = . 05, what is the decision on H0? A. Reject the null hypothesis B. Do not reject the null hypothesis AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 7 Topic: Two population variances 1-882 Chapter 01 - An Introduction to Business Statistics 65. When testing H0: σ12 ≤ σ22 HA: σ12> σ22 where s12 = .004, s22 = .002, n1 = 4, n2 = 7 at α = . 05, what critical value do we use? A. 1.833 B. 1.796 C. 4.12 D. 4.76 AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 7 Topic: Two population variances 66. What is the value of the computed F-statistic for testing equality of population variances where s12 = .004, s22 = .002? Consider HA: σ12> σ22. A. 1 B. 0.001 C. 0.05 D. 2 AACSB: Analytic Bloom's: Application Difficulty: Easy Learning Objective: 7 Topic: Two population variances 1-883 Chapter 01 - An Introduction to Business Statistics 67. Construct a 95 percent confidence interval for µ1- µ2, where s1 = 9, s2= 6, n1 = 10, n2 = 16. (Assume equal population variance) A. (1.59 14.23) B. (2.10 13.72) C. (1.86 13.96) D. (1.88 13.94) 1 = 34.36, 2 = 26.45, t24,025 = 2.064 (34.36 - 26.45) ± (2.064)(2.9312) 1.86 to 13.96 AACSB: Analytic Bloom's: Application Difficulty: Hard Learning Objective: 2 Topic: Two independent population means 68. When testing H0: µ1 - µ2 = 2, HA: µ1 - µ2> 2, where 24, n1= 40, n2 = 30, at α = .01, what can we conclude? A. Fail to reject H0 B. Reject H0 AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 1 Topic: Two independent population means 1-884 1 = 522, 2 = 516, σ12 = 28, σ22 = Chapter 01 - An Introduction to Business Statistics 69. When testing H0: µ1 - µ2 = 2, HA: µ1 - µ2> 2, where = 24, n1= 40, n2 = 30, at α = .01, what is the test statistic? A. 4.91 B. 2.33 C. 3.27 D. 2.67 1 = 522, 2 = 516, σ12 = 28, σ22 AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 1 Topic: Two independent population means 70. When we test H0: µ1 ≤ µ2, HA: µ1 > µ2at α = .10, where 3.3, s2 = 2.1, n1 = 6, n2= 6, we can reject the null hypothesis. A. True B. False AACSB: Analytic Bloom's: Application Difficulty: Hard Learning Objective: 2 Topic: Two independent population means 1-885 1 = 77.4, 2 = 72.2, s1 = Chapter 01 - An Introduction to Business Statistics 71. When we test H0: µ1 ≤ µ2, HA: µ1 > µ2at α = .10, where s2 = 2.1, n1 = 6, n2= 6, what is the estimated pooled variance? A. 2.77 B. 6.38 C. 2.52 D. 7.65 1 = 77.4, 2 = 72.2, s1 = 3.3, AACSB: Analytic Bloom's: Application Difficulty: Hard Learning Objective: 2 Topic: Two independent population means 72. What is the value of the F-statistic for H0: σ12 ≤ σ12, HA: σ12> σ12, where s1= 3.3, and s2 = 2.1. A. 2.47 B. 1.57 C. 6.48 D. 6.10 AACSB: Analytic Bloom's: Application Difficulty: Easy Learning Objective: 7 Topic: Two population variances 1-886 Chapter 01 - An Introduction to Business Statistics 73. When we test H0: p1 - p2 ≤ .01, HA: p1 - p2 > .01 at α = .05 where n1= 200, n2 = 400, we can reject the null hypothesis. A. True B. False 1 = .08, 2 = .035, 1.643 < 1.645, failed to reject H0 AACSB: Analytic Bloom's: Application Difficulty: Hard Learning Objective: 5 Topic: Two independent population proportions 74. When we test H0: p1- p2 ≤ .01, HA: p1 - p2 > .01 at α = .05 where 1 = .08, 2 = .035, n1= 200, n2 = 400, what is the standard deviation used in the calculation of the test statistic? A. 0.0005 B. 0.3277 C. 0.0213 D. 0.0134 1.643 < 1.645, failed to reject H0 AACSB: Analytic Bloom's: Application Difficulty: Hard Learning Objective: 5 Topic: Two independent population proportions 1-887 Chapter 01 - An Introduction to Business Statistics 75. Testing H0: σ12= σ12, HA: σ12> σ22 at α = .01 where n1 = 5, n2= 6, s12 = 15750, s22 = 10920 we conclude that we cannot reject the null hypothesis. A. True B. False AACSB...
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## This document was uploaded on 01/20/2014.

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