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# 275 2 25 n1 1000 n2 1000 chapter 01 an introduction

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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 F-statistic 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 1-895 = .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 1-896 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 1-897 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 1-898 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 1-899 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 1-900 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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