CHAPTER 11 SECTION 3: INTRODUCTION TO HYPOTHESIS TESTING
MULTIPLE CHOICE
150.For a given level of significance, if the sample size increases, the probability of a Type II error will:
a. remain the same.
b. increase.
c. decrease.
d. be equal to 1.0 regardless of .
ANS:CPTS:1REF:SECTION 11.3
151.The power of a test is measured by its capability of:
a. rejecting a null hypothesis that is true.
b. not rejecting a null hypothesis that is true.
c. rejecting a null hypothesis that is false.
d. not rejecting a null hypothesis that is false.
ANS:CPTS:1REF:SECTION 11.3
152.If the probability of committing a Type I error for a given test is decreased, then for a fixed sample size n, the probability of committing a Type II error will:
a. decrease.
b. increase.
c. stay the same.
d. Not enough information to tell.
ANS:BPTS:1REF:SECTION 11.3
153.The power of a test is denoted by:
a.
b.
c. 1
d. 1
ANS:DPTS:1REF:SECTION 11.3
154.For a given sample size n, if the level of significance is decreased, the power of the test will:
a. increase.
b. decrease.
c. remain the same.
d. Not enough information to tell.
ANS:BPTS:1REF:SECTION 11.3
155.For a given level of significance , if the sample size n is increased, the probability of a Type II error will:
a. decrease.
b. increase.
c. remain the same.
d. Not enough information to tell.
ANS:APTS:1REF:SECTION 11.3
156.If we want to compute the probability of a Type II error, which of the following statements is false?
a. We need to know the significance level .
b. We need to know the sample size n.
c. We need to know the alternative value of the population mean .
d. All of these choices are true.
ANS:DPTS:1REF:SECTION 11.3
157.Which of the following statements is false regarding the operating characteristic (OC) curve?
a. The OC curve plots the values of versus the values of .
b. The OC curve plots the values of versus the values of .
c. The OC curve can be useful in selecting a sample size n.
d. None of these choices.
ANS: B PTS: 1 REF: SECTION 11.3
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