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Unformatted text preview: tatistics 89. 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
CON= .20,
nCON = 300, nBKG = 400, calculate the estimated standard deviation for the model.
A. 0.0008
B. 0.0289
C. 0.0200
D. 0.0106 BKG = .14, 1.384 > 1.28, reject H0 AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 5
Topic: Two independent population proportions 90. What is the Fstatistic for testing H0: σ12 ≤ σ22, HA: σ22> σ12 at
n2= 19, s12 = .03, s22 = .02?
A. 1.50
B. 0.67
C. 1.22
D. 2.25 AACSB: Analytic
Bloom's: Application
Difficulty: Easy
Learning Objective: 7
Topic: Two population variances 1895 = .05 where n1 = 16, Chapter 01  An Introduction to Business Statistics 91. Testing H0: σ12 ≤ σ22, HA: σ12> σ22 at α = .05 where n1 = 16, n2= 19, s12 = .03, s22 = .02, we
fail to reject the null hypothesis.
A. True
B. False AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 7
Topic: Two population variances 92. Using the following data a test of the equality of variances for two populations at α = .10,
where sample 1 is randomly selected from population 1 and sample 2 is randomly selected
from population 2 finds that we reject H0 at α = .10. A. True
B. False AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 7
Topic: Two population variances 1896 Chapter 01  An Introduction to Business Statistics 93. Use the following data and a test of the equality of variances for two populations at α = .
10, where sample 1 is randomly selected from population 1 and sample 2 is randomly selected
from population 2. Identify the critical value used for testing the equality of the variances. A. 1.138
B. 1.645
C. 5.05
D. 6.39 AACSB: Analytic
Bloom's: Application
Learning Objective: 7
Topic: Two population variances 1897 Chapter 01  An Introduction to Business Statistics 94. Testing the equality of means at
= .05, where sample 1 has data: 16, 14, 19, 18, 19, 20,
15, 18, 17, 18, and sample 2 has data: 13, 19, 14, 17, 21, 14, 15, 10, 13, 15 (Assume equal
population variances), we determine that 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 95. Calculate the pooled variance where sample 1 has data: 16, 14, 19, 18, 19, 20, 15, 18, 17,
18, and sample 2 has data: 13, 19, 14, 17, 21, 14, 15, 10, 13, 15.
A. 2.539
B. 6.566
C. 6.856
D. 6.170 AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 2
Topic: Two independent population means 1898 Chapter 01  An Introduction to Business Statistics 96. Determine the 95% confidence interval for the difference between two population means
where sample 1 has data: 16, 14, 19, 18, 19, 20, 15, 18, 17, 18, and sample 2 has data: 13, 19,
14, 17, 21, 14, 15, 10, 13, 15. (Assume equal population variances)
A. (0.16 4.76)
B. (0.58 5.18)
C. (0.01 4.59)
D. (0.56 4.04) AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 2
Topic: Two independent population means 97. Calculate the t statistic for testing equality of means where
5.4, s22 = 5.2, n1= 6, n2 = 7. (Assume equal population variances)
A. 2.42
B. 1.05
C. 2.63
D. 4.86 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 2
Topic: Two independent population means 1899 1 = 8.2, 2 = 11.3, s12 = Chapter 01  An Introduction to Business Statistics 98. Find a 99 percent confidence interval for the difference between means n1 = 49, n2 = 49,
2
2
= 87,
2 = 92, σ1 = 13 and σ2 = 15.
A. (12.30 2.30)
B. (6.47 3.53)
C. (6.94 3.05)
D. (5.57 4.43)
1 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 1
Topic: Two independent population means 99. Let p1 represent the population proportion of U.S. Senate and Congress (House of
Representatives) democrats who are in favor of a new modest tax on "junk food". Let p2
represent the population proportion of U.S. Senate and Congress (House of Representative)
republicans who are in favor of a new modest tax on "junk food". Out of the 265 democratic
senators and congressman 106 of them are in favor of a "junk food" tax. Out of the 285
republican senators and congressman only 57 of them are in favor of a "junk food" tax. Find a
95 percent confidence interval for the difference between proportions l and 2.
A. (0.197 0.203)
B. (0.163 0.238)
C. (0.108 0.292)
D. (0.125 0.275) AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 5
Topic: Two independent population proportions 1900 Chapter 01  An Introduction to Business Statistics 100. Let p1 represent the population proportion of U.S. Senate and Congress (House of
Representatives) democrats who are in favor of a new modest tax on "junk food". Let p2
represent the population proportion of U.S. Senate and Congress (House of Representative)
rep...
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This document was uploaded on 01/20/2014.
 Winter '14

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