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Learning Objective: 2
Topic: Two independent population means 1876 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 1877 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 1878 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 1879 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. pvalue
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 1880 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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This document was uploaded on 01/20/2014.
 Winter '14

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