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Unformatted text preview: , independent random samples with known variances, the correct test statistic to use is:
A. Z statistic
B. t statistic
C. F statistic
D. Chisquare statistic
E. None of the above AACSB: Reflective Thinking
Bloom's: Comprehension
Difficulty: Medium
Learning Objective: 1
Topic: Two independent population means 1867 Chapter 01  An Introduction to Business Statistics 27. 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 alternative hypothesis
for this problem would be stated as:
A. Pinternet Pstore> 0
B. Pinternet Pstore< 0
C. Pinternet Pstore ≥ 0
D. Pinternet Pstore ≤ .10
E. Pinternet Pstore > .10 AACSB: Reflective Thinking
Bloom's: Comprehension
Difficulty: Medium
Learning Objective: 5
Topic: Two independent population proportions 28. If the Z statistic (critical value) is incorrectly used in lieu of the t statistic when comparing
two means from independent populations using small samples, the chance of rejecting the null
hypothesis __________.
A. Increases
B. Decreases
C. Remains the same AACSB: Reflective Thinking
Bloom's: Comprehension
Difficulty: Hard
Learning Objective: 2
Topic: Two independent population means 29. When testing a hypothesis about the mean of a 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. Chisquare
E. None of the above AACSB: Reflective Thinking
Bloom's: Comprehension
Difficulty: Medium
Learning Objective: 4
Topic: Paired differences 1868 Chapter 01  An Introduction to Business Statistics 30. When comparing the variances of two normally distributed populations using independent
random samples, the correct test statistic to use is __________.
A. Z
B. t
C. F
D. Chisquare
E. None of the above AACSB: Reflective Thinking
Bloom's: Comprehension
Difficulty: Medium
Learning Objective: 7
Topic: Two population variances 31. When testing the difference between two population proportions using large independent
random samples, __________ test statistic is used.
A. Z
B. t
C. F
D. Chisquare
E. None of the above AACSB: Reflective Thinking
Bloom's: Comprehension
Difficulty: Medium
Learning Objective: 5
Topic: Two independent population proportions 32. If the Z statistic (critical value) is incorrectly used in lieu of the t statistic when comparing
two means from independent populations using small samples, the chance of committing a
Type II error __________.
A. Increases
B. Decreases
C. Remains the same AACSB: Reflective Thinking
Bloom's: Synthesis
Difficulty: Hard
Learning Objective: 2
Topic: Two independent population means 1869 Chapter 01  An Introduction to Business Statistics 33. A financial analyst working for a financial consulting company wishes to find evidence
that the average pricetoearnings ratio in the consumer industry is higher than average pricetoearnings ratio in banking industry. The alternative hypothesis is:
A. µconsumer= µbanking
B. µconsumer≤ µbanking
C. µconsumer> µbanking
D. µconsumer< µbanking
E. µconsumer≠ µbanking AACSB: Reflective Thinking
Bloom's: Comprehension
Difficulty: Medium
Learning Objective: 1
Topic: Two independent population means 34. In testing the difference between two means from two normally distributed independent
populations, the distribution of the difference in sample means will be:
A. Normally distributed only if sample sizes are equal.
B. Normally distributed only if both population standard deviations are known.
C. Normally distributed.
D. Normally distributed if both sample sizes are very large.
E. Normally distributed only if both population variances are equal. AACSB: Reflective Thinking
Bloom's: Synthesis
Difficulty: Medium
Learning Objective: 1
Topic: Two independent population means 1870 Chapter 01  An Introduction to Business Statistics 35. In testing the difference between the means of two normally distributed populations using
small independent random samples, the most appropriate test statistic is the _________
statistic.
A. Z
B. t
C. F
D. Chisquare
E. None of the above AACSB: Reflective Thinking
Bloom's: Comprehension
Difficulty: Easy
Learning Objective: 2
Topic: Two independent population means 36. If we are testing the hypothesis about the mean of a population of paired differences with
samples of n1 = 10, n2 = 10, the degrees of freedom for the t statistic is ____.
A. 19
B. 18
C. 9
D. 8
E. 10 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 4
Topic: Paired differences 1871 Chapter 01  An Introduction to Business Statistics 37. If we are testing the difference between the means of two normally distributed
independent populations with samples of n1 = 10, n2 = 10, the degrees of freedom for the t
statistic is ____.
A. 19
B. 18
C. 9
D. 8
E. 20 AACSB: Analytic
Bloom's: Application
Difficulty:...
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This document was uploaded on 01/20/2014.
 Winter '14

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