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Unformatted text preview: : Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 7
Topic: Two population variances 76. When testing H0: σ12= σ12, HA: σ12> σ22 at α = .01 where n1 = 5, n2= 6, s12 = 15750, s22 =
10920 what critical value do we use?
A. 2.821
B. 11.39
C. 8.75
D. 1.443 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 7
Topic: Two population variances 1888 Chapter 01  An Introduction to Business Statistics 77. Find a 95 percent confidence interval for µ1 µ2, where n1= 50, n2 = 75,
76, σ12 = 8 and σ22 = 6.
A. (5.04 6.96)
B. (5.53 6.47)
C. (5.19 6.81)
D. (5.41 6.59) 1 = 82, 1 = 1.94, 2 = AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 1
Topic: Two independent population means 78. Find a 95 percent confidence interval for µ1 µ2, where n1= 15, n2 = 10,
= 1.04, s12 = .2025 and s22 = .0676. (Assume equal population variances)
A. (0.587 1.213)
B. (0.848 0.952)
C. (0.629 1.171)
D. (0.573 1.227) AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 2
Topic: Two independent population means 1889 2 Chapter 01  An Introduction to Business Statistics 79. Find a 98 percent confidence interval for the paired difference.
.
A. (1.118 4.318)
B. (1.277 4.477)
C. (1.075 2.125)
D. (1.104 2.096) AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 4
Topic: Paired differences 80. Find a 90 percent confidence interval for the difference between the proportions of
failures in factory 1 and factory 2 where
A. (0.0037 0.0237)
B. (0.0076 0.0276)
C. (0.0004 0.0196)
D. (0.0098 0.0102) 1 = .05, AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 5
Topic: Two independent population proportions 1890 2 = .04, n1= 500, n2 = 2000. Chapter 01  An Introduction to Business Statistics 81. With a 90 percent confidence interval for the difference between the proportions of
failures in factory 1 and factory 2 where
1 = .05,
0276) can we reject the null hypothesis at α = .10?
A. Yes, reject the null hypothesis
B. No; we can't reject the null hypothesis 2 = .04, n1= 500, n2 = 2000 of (.0076 . AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 5
Topic: Two independent population proportions 82. Find a 95 percent confidence interval for the difference between the proportions of older
and younger drivers who have tickets where
A. (.007 .057)
B. (.024 .026)
C. (.002 .052)
D. (.014 .064) 1 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 5
Topic: Two independent population proportions 1891 = .275, 2 = .25, n1= 1000, n2 = 1000. Chapter 01  An Introduction to Business Statistics 83. Find a 95 percent confidence interval for the difference between means where n1 = 50, n2=
36,
1 = 80,
A. (4.16 5.84)
B. (3.30 6.70)
C. (4.40 5.60)
D. (4.64 5.36) 2 = 75, σ12 = 5 and σ22 = 3. AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 1
Topic: Two independent population means 84. Find a 95 percent confidence interval for µ1 µ2, where n1= 9, n2 = 6,
59, s12 = 6 and s22 = 3. (Assume equal population variances)
A. (2.357 7.643)
B. (2.494 7.506)
C. (2.528 7.472)
D. (3.840 6.160) AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 2
Topic: Two independent population means 1892 1 = 64, 2 = Chapter 01  An Introduction to Business Statistics 85. Find a 90 percent confidence interval for the difference between the proportions of Group
l and Group 2. Let p1 represent the population proportion of the people in group 1 who are in
favor of new packaging and Let p2 represent the population proportion of the people in group
2 who are in favor of new packaging, where
1 = .21,
2 = .13, n1= 300, n2 = 400.
A. (.0472 .1128)
B. (.0510 .1090)
C. (.0232 .1368)
D. (.0324 .1276) AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 5
Topic: Two independent population proportions 86. When we test H0: µ1 µ2 ≤ 0, HA: µ1 µ2> 0,
1 = 15.4,
= 35, n2 = 18 at α = .01, we can reject the null hypothesis.
A. True
B. False AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 1
Topic: Two independent population means 1893 2 = 14.5, σ1 = 2, σ2 = 2.28, n1 Chapter 01  An Introduction to Business Statistics 87. When we test H0: µ1 µ2 ≤ 0, HA: µ1 µ2> 0,
= 35, n2 = 18 at α = .01, the test statistic used is:
A. 1.42
B. 2.10
C. 2.33
D. 21.6 1 = 15.4, 2 = 14.5, σ1 = 2, σ2 = 2.28, n1 AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 1
Topic: Two independent population means 88. At
= .10, testing the hypothesis that the proportion of Consumer (CON) industry
companies winter quarter profit growth is more than 2% greater than the proportion of
Banking (BKG) companies winter quarter profit growth, given that
14, nCON = 300, nBKG = 400, we fail to reject the null hypothesis.
A. True
B. False 1.384 > 1.28, reject H0 AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 5
Topic: Two independent population proportions 1894 CON = .20, BKG =. Chapter 01  An Introduction to Business S...
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 Winter '14

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