# BUS 310 Ch.9 Quiz

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question
Which of the following would be an appropriate null hypothesis? A. The mean of a population is equal to 55. B. The mean of a sample is equal to 55. C. The mean of a population is greater than 55. D. Only (a) and (c) are true.
A
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Which of the following would be an appropriate alternative hypothesis? A. The mean of a population is equal to 55. B. The mean of a sample is equal to 55. C. The mean of a population is greater than 55. D. The mean of a sample is greater than 55.
C
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A Type II error is committed when A. we reject a null hypothesis that is true. B. we don't reject a null hypothesis that is true. C. we reject a null hypothesis that is false. D. we don't reject a null hypothesis that is false.
D
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A Type I error is committed when A. we reject a null hypothesis that is true. B. we don't reject a null hypothesis that is true. C. we reject a null hypothesis that is false. D. we don't reject a null hypothesis that is false.
A
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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.
C
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True or False: For a given level of significance, if the sample size is increased, the power of the test will increase. A. True B. False
A
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If an economist wishes to determine whether there is evidence that average family income in a community exceeds \$25,000 A. either a one-tailed or two-tailed test could be used with equivalent results. B. a one-tailed test should be utilized. C. a two-tailed test should be utilized. D. None of the above.
B
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We have created a 95% confidence interval for μ with the result (10, 15). What decision will we make if we test H0: μ = 16 vs H1: μ ≠ 16 at α = 0.05? A. Reject H0 in favor of H1. B. Accept H0 in favor of H1. C. Fail to reject H0 in favor of H1. D. We cannot tell what our decision will be from the information given.
A
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The value that separates a rejection region from a non-rejection region is called the {critical value}.
True
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A ___________ is a numerical quantity computed from the data of a sample and is used in reaching a decision on whether or not to reject the null hypothesis. A. significance level B. critical value C. test statistic