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Unformatted text preview: edium Learning Objective: 2 Topic: Two independent population means 1-876 Chapter 01 - An Introduction to Business Statistics 48. When comparing two independent population means when population variances are not known and the samples are normally distributed, the correct test statistic to use is ____. A. Z B. t C. F D. t2 AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 2 Topic: Two independent population means 49. When comparing two independent population variances, the correct test statistic to use is __________. A. Z B. t C. F D. t2 AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 7 Topic: Two population variances 50. When comparing two independent population means where the population variances are known and n1 and n2 are sufficiently large, the correct test statistic to use is ____. A. Z B. t C. F D. t2 AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 1 Topic: Two independent population means 1-877 Chapter 01 - An Introduction to Business Statistics 51. An experiment in which there is no relationship between the measurements on the different samples is a(n) ______ experiment. A. Paired difference B. Equal variances C. Independent samples D. Dependent samples AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 3 Topic: Two independent population means 52. An experiment in which two different measurements are taken on the same units and inferences are made using the differences between the pairs of measurements is a(n) ______ experiment. A. Paired difference B. Equal variances C. Independent samples D. Dependent samples AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 3 Topic: Paired differences 53. When testing the difference for the population of paired differences in which two different observations are taken on the same units, the correct test statistic to use is ____. A. Z B. t C. F D. t2 AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 4 Topic: Paired differences 1-878 Chapter 01 - An Introduction to Business Statistics 54. 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 the administration of the drug is an example of testing the difference between two ____________ A. samples of equal variances B. independent samples C. paired samples D. samples of unequal variances AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 3 Topic: Paired differences 55. In general, the shape of the F distribution is _________. A. skewed right B. skewed left C. normal D. binomial AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 6 Topic: Two population variances 56. In testing the difference between the means of two independent populations, the variances of the two samples can be pooled if the population variances are assumed to be ____________. A. Unequal B. Greater than the mean C. Sum to 1 D. Equal AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 2 Topic: Two independent population means 1-879 Chapter 01 - An Introduction to Business Statistics 57. In testing the difference between two independent population means if the variances of the two populations are not equal the critical value of the t statistic is obtained by calculating ___________________. A. degrees of freedom B. the sum of the two sample sizes (n1 + n2) C. p-value D. pooled variance AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 2 Topic: Two independent population means 58. In testing the difference between two independent population means, it is assumed that the level of measurement is at least ______________. A. a ratio variable B. a qualitative variable C. an interval variable D. a categorical variable AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 1 Topic: Two independent population means 59. In comparing the difference between two independent population means, by using two small independent samples, the sampling distributions of the population means are at least approximately ________________. A. skewed right B. skewed left C. normal D. binomial AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Learning Objective: 2 Topic: Two independent population means 1-880 Chapter 01 - An Introduction to Business Statistics 60. The test of means for two related populations match the observations (matched pairs) in order to reduce the ________________ attributable to the difference between individual observations and other factors. A...
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