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Unformatted text preview: in the east and west coasts to see the percentage of the customers who prefer chicken to other meat. The data are given below. What is the test statistic for this hypothesis test? A. 1.645 B. 3.92 C. 1.96 D. 3.09 AACSB: Analytic Bloom's: Application Difficulty: Hard Learning Objective: 5 Topic: Two independent population proportions 1-919 Chapter 01 - An Introduction to Business Statistics 120. A marketing research company surveyed grocery shoppers in the east and west coasts to see the percentage of the customers who prefer chicken to other meat. The data are given below. Determine the 95% confidence interval for the difference between the proportion of customers who prefer chicken at the West Coast and the proportion of customers who prefer chicken at the East Coast. A. (0.075 0.183) B. (0.044 0.213) C. (0.096 0.161) D. (0.064 0.193) AACSB: Analytic Bloom's: Application Difficulty: Hard Learning Objective: 5 Topic: Two independent population proportions 1-920 Chapter 01 - An Introduction to Business Statistics 121. Two hospital emergency rooms use different procedures for triage of their patients. We want to test the claim that the mean waiting time of patients is the same for both hospitals. The 40 randomly selected subjects from one hospital produce a mean of 18.3 minutes. The 50 randomly selected patients from the other hospital produce a mean of 25.31 minutes. Assume a σa = 2.1 minutes and σb = 2.92 minutes. Setup the null hypothesis to determine if there is a difference in the mean waiting time between the two hospitals. 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: 1 Topic: Two independent population means 122. Two hospital emergency rooms use different procedures for triage of their patients. We want to test the claim that the mean waiting time of patients is the same for both hospitals. The 40 randomly selected subjects from one hospital produce a mean of 18.3 minutes. The 50 randomly selected patients from the other hospital produce a mean of 25.31 minutes. Assume a σa = 2.1 minutes and σb = 2.92 minutes. Calculate the test statistic for testing these hypothesis. A. -21.05 B. -24.97 C. -13.24 D. -18.49 AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 1 Topic: Two independent population means 1-921 Chapter 01 - An Introduction to Business Statistics 123. Two hospital emergency rooms use different procedures for triage of their patients. We want to test the claim that the mean waiting time of patients is the same for both hospitals. The 40 randomly selected subjects from one hospital produce a mean of 18.3 minutes. The 50 randomly selected patients from the other hospital produce a mean of 25.31 minutes. Assume a σa = 2.1 minutes and σb = 2.92 minutes. What do you conclude about the waiting time for patients in the two hospitals testing at α = .001? A. There is a significant difference in waiting times B. There is no significant difference in waiting times Z = -13.24 compared to critical value z of -3.29 AACSB: Reflective Thinking Bloom's: Synthesis Difficulty: Medium Learning Objective: 1 Topic: Two independent population means 124. A test of spelling ability is given to a random sample of 10 students before and after they completed a spelling course. The mean score before the course was 119.60 and after the course the mean score was 130.80. The standard deviation of the difference was 16.061. Calculate the test statistic to test the claim. A. 2.21 B. 0.697 C. 2.09 D. 6.97 AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 4 Topic: Paired differences 1-922 Chapter 01 - An Introduction to Business Statistics 125. A test of spelling ability is given to a random sample of 10 students before and after they completed a spelling course. The mean score before the course was 119.60 and after the course the mean score was 130.80. The standard deviation of the difference was 16.061. Test the hypothesis at = .05 A. Reject H0 B. Fail to reject H0 t.025 for n-1 degree of freedom, t.025 for 9 = 2.26 AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 4 Topic: Paired differences 126. A test of spelling ability is given to a random sample of 10 students before and after they completed a spelling course. The mean score before the course was 119.60 and after the course the mean score was 130.80. The standard deviation of the difference was 16.061. Calculate a 99% confidence interval. A. (-3.13 25.53) B. (6.12 16.28) C. (-1.88 24.28) D. (-5.31 27.71) AACSB: Analytic Bloom's: Application Difficulty: Medium Learning Objective: 4 Topic: Paired differences 1-923 Chapter 01 - An Introduction to Business Statistics 127. A test of spelling ability is given to a random sample of 10 students before and after they completed a spelling course. The mean score before the course was 119.60 and after the course the mean score was 130.80. The standard deviation of the d...
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