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We want to test the claim that the mean waiting time

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Unformatted text preview: ifference was 16.061. What do you conclude at α = .01? A. No evidence of a difference B. Significant difference in the scores AACSB: Reflective Thinking Bloom's: Synthesis Difficulty: Medium Learning Objective: 4 Topic: Paired differences 128. A coffee shop franchise owner is looking at two possible locations for a new shop. To help make a decision he looks at the number of pedestrians that go by each of the two locations in one-hour segments. At location A, counts are taken for 35 one-hour units and with a mean number of pedestrians of 421 and a sample standard deviation of 122. At the second location (B), counts are taken for 50 one hour units with a mean number of pedestrians of 347 and a sample standard deviation of 85. Assume the two populations variances are not known but are equal. Calculate the pooled estimate of . A. 10362.42 B. 101.80 C. 22.40 D. 503.32 AACSB: Analytic Bloom's: Application Difficulty: Hard Learning Objective: 2 Topic: Two independent population means 1-924 Chapter 01 - An Introduction to Business Statistics 129. A coffee shop franchise owner is looking at two possible locations for a new shop. To help make a decision he looks at the number of pedestrians that go by each of the two locations in one-hour segments. At location A, counts are taken for 35 one-hour units and with a mean number of pedestrians of 421 and a sample standard deviation of 122. At the second location (B), counts are taken for 50 one hour units with a mean number of pedestrians of 347 and a sample standard deviation of 85. Assume the two populations variances are not known but are equal. Calculate a 95% confidence interval for the difference in pedestrian traffic at the two locations. (pooled estimate of = 22.4) A. (37.15 110.85) B. (14.6 59.4) C. (51.6 96.4) D. (30.1 117.9) [74 ± (1.96) 22.4)] = [74 ± 43.9] = [30.1, 117.9] AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 2 Topic: Two independent population means 130. A coffee shop franchise owner is looking at two possible locations for a new shop. To help make a decision he looks at the number of pedestrians that go by each of the two locations in one-hour segments. At location A, counts are taken for 35 one-hour units and with a mean number of pedestrians of 421 and a sample standard deviation of 122. At the second location (B), counts are taken for 50 one hour units with a mean number of pedestrians of 347 and a sample standard deviation of 85. Assume the two populations variances are not known but are equal. Setup the null hypothesis to test the claim that both sites have the same number of pedestrians. A. µa - µb = 0 B. µa - µb ≠ 0 C. µa - µb > 0 D. µa - µb < 0 AACSB: Reflective Thinking Bloom's: Application Difficulty: Medium Learning Objective: 2 Topic: Two independent population means 1-925 Chapter 01 - An Introduction to Business Statistics 131. A coffee shop franchise owner is looking at two possible locations for a new shop. To help make a decision he looks at the number of pedestrians that go by each of the two locations in one-hour segments. At location A, counts are taken for 35 one-hour units and with a mean number of pedestrians of 421 and a sample standard deviation of 122. At the second location (B), counts are taken for 50 one hour units with a mean number of pedestrians of 347 and a sample standard deviation of 85. Assume the two populations variances are not known but are equal. (pooled variance = 22.4) Testing the claim that both sites have the same mean number of pedestrians at = .01, what do you conclude? A. There is a difference between the two sites B. There is no difference between the two sites AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 2 Topic: Two independent population means 132. In a market research study conducted by a local winery on white wine preference, the following results were found. Of a sample of 500 men, 120 preferred white wine and of a sample of 500 women, 210 preferred white wine. Setup the alternative hypothesis that will test the claim that the percentage of women preferring white wine is 25% higher than men. A. Pw - Pm ≠ .25 B. Pw - Pm > .25 C. Pw - Pm < .25 D. Pw - Pm ≠ 0 AACSB: Reflective Thinking Bloom's: Application Difficulty: Medium Learning Objective: 5 Topic: Two independent population proportions 1-926 Chapter 01 - An Introduction to Business Statistics 133. In a market research study conducted by a local winery on white wine preference, the following results were found. Of a sample of 500 men, 120 preferred white wine and of a sample of 500 women, 210 preferred white wine. Calculate the test statistic for testing the claim that women are 25% higher than men on preference for white wine. A. 6.167 B. -82.16 C. -2.397 D. -.07 AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 5 Topic: Two independent population proportions 134. In a market research study conducted by a local winery on white wine preference, the following results wer...
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