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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 1881 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 1882 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 Fstatistic 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 1883 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 1884 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 1885 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 Fstatistic 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 1886 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 1887 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.
 Winter '14

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