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True aacsb reflective thinking blooms comprehension

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Unformatted text preview: ations are at least 30. FALSE AACSB: Reflective Thinking Bloom's: Analysis Difficulty: Hard Learning Objective: 2 Topic: Two independent population means 1-863 Chapter 01 - An Introduction to Business Statistics 16. When comparing two population means based on independent random samples, the pooled estimate of the variance is used if both population standard deviations are known. FALSE AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Hard Learning Objective: 2 Topic: Two independent population means 17. Assume that we are constructing confidence interval for the difference in the means of two populations based on independent random samples. If both sample sizes and the distribution of both populations are highly skewed, then a confidence interval for the difference in the means can be constructed using the t test statistic. FALSE AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Hard Learning Objective: 2 Topic: Two independent population means 18. If the limits of the confidence interval of the difference between the means of two normally distributed populations were 8.5 and 11.5 at the 95% confidence level, then we can conclude that we are 95% certain that there is a significant difference between the two population means. TRUE AACSB: Reflective Thinking Bloom's: Evaluation Difficulty: Hard Learning Objective: 1 Topic: Two independent population means 1-864 Chapter 01 - An Introduction to Business Statistics 19. If the limits of the confidence interval of the difference between the means of two normally distributed populations were from -2.6 and 1.4 at the 95% confidence level, then we can conclude that we are 95% certain that there is a significant difference between the two population means. FALSE AACSB: Reflective Thinking Bloom's: Evaluation Difficulty: Hard Learning Objective: 1 Topic: Two independent population means 20. When we are testing a hypothesis about the difference in two population proportions based on large independent samples, we compute a combined (pooled) proportion from the two samples if we assume that there is no difference between the two proportions in our null hypothesis. TRUE AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 5 Topic: Two independent population proportions Multiple Choice Questions 21. In testing for the equality of variances from two independent populations, if the null hypothesis is false, the test could result in: A. A Type I error. B. Either a Type I error or a Type II error. C. Neither a Type I error or a Type II error. D. A Type II error. E. Both a Type I error and a Type II error. AACSB: Reflective Thinking Bloom's: Evaluation Difficulty: Medium Learning Objective: 7 Topic: Two population variances 1-865 Chapter 01 - An Introduction to Business Statistics 22. In testing for the equality of means from two independent populations, if the null hypothesis is rejected, the test could result in: A. A Type I error. B. Either a Type I error or a Type II error. C. Neither a Type I error or a Type II error. D. A Type II error. E. Both a Type I error and a Type II error. AACSB: Reflective Thinking Bloom's: Evaluation Difficulty: Medium Learning Objective: 1 Topic: Two independent population means 23. In testing for the equality of means from two independent populations, if the hypothesis of equal population means is rejected at α = .01, it will __________ be rejected at α = .05. A. Always B. Sometimes C. Never AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Hard Learning Objective: 1 Topic: Two independent population means 24. A new company is in the process of evaluating its customer service. The company offers two types of sales: 1. Internet sales; 2. Store sales. The marketing research manager believes that the Internet sales are more than 10% higher than store sales. The null hypothesis would be: A. Pinternet- Pstore> .10 B. Pinternet- Pstore< .10 C. Pinternet- Pstore ≥ .10 D. Pinternet- Pstore ≤ .10 E. Pinternet- Pstore = .10 AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 5 Topic: Two independent population proportions 1-866 Chapter 01 - An Introduction to Business Statistics 25. In order to test the effectiveness of a drug called XZR designed to reduce cholesterol levels, 9 heart patients' cholesterol levels are measured before they are given the drug. The same 9 patients use XZR for two continuous months. After two months of continuous use the 9 patients' cholesterol levels are measured again. The comparison of cholesterol levels before vs. after administering the drug is an example of testing the difference between: A. Two means from independent populations. B. Two population variances from independent populations. C. Two population proportions. D. Matched pairs from two dependent populations. AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 4 Topic: Paired differences 26. In testing the difference between the means of two normally distributed populations using large...
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