The marketing manager for an automobile manufacturer is interested in determining the proportion of new compact-car owners who would have purchased a side curtain air bag if it had been available for an additional cost of 300. The manager believes from previous information that the proportion is 0.30. Suppose that a survey of 200 new compact-car owners is selected and 79 indicate that they would have purchased the side curtain air bags. If you were to conduct a test to determine whether there is evidence that the proportion is different from 0.30, which test would you use?
A) Z test of a population proportion B) t test of a population proportion
C) Z test of a population mean D) t test of population mean
Q. 2A major Blu-ray rental chain is considering opening a new store in an area that currently does not have any such stores. The chain will open if there is evidence that more than 5,000 of the 20,000 households in the area are equipped with Blu-ray players. It conducts a telephone poll of 300 randomly selected households in the area and finds that 96 have Blu-ray players. The rental chain's conclusion from the hypothesis test using a 5 level of significance is
A) to open a new store.
B) to delay opening a new store until additional evidence is collected.
C) not to open a new store.
D) We cannot tell what the decision should be from the information given.
Q. 3A major Blu-ray rental chain is considering opening a new store in an area that currently does not have any such stores. The chain will open if there is evidence that more than 5,000 of the 20,000 households in the area are equipped with Blu-ray players. It conducts a telephone poll of 300 randomly selected households in the area and finds that 96 have Blu-ray players. The decision on the hypothesis test using a 5 level of significance is
A) to fail to reject H0 in favor of H1.
B) to reject H0 in favor of H1.
C) to accept H0 in favor of H1.
D) We cannot tell what the decision should be from the information given.
Q. 4A major Blu-ray rental chain is considering opening a new store in an area that currently does not have any such stores. The chain will open if there is evidence that more than 5,000 of the 20,000 households in the area are equipped with Blu-ray players. It conducts a telephone poll of 300 randomly selected households in the area and finds that 96 have Blu-ray players. The p-value associated with the test statistic in this problem is approximately equal to
A) 0.0026. B) 0.0013. C) 0.0051. D) 0.0100.
Q. 5A major Blu-ray rental chain is considering opening a new store in an area that currently does not have any such stores. The chain will open if there is evidence that more than 5,000 of the 20,000 households in the area are equipped with Blu-ray players. It conducts a telephone poll of 300 randomly selected households in the area and finds that 96 have Blu-ray players. The value of the test statistic in this problem is approximately equal to
A) 2.60. B) 1.30. C) 2.80. D) 1.94.
Q. 6A major Blu-ray rental chain is considering opening a new store in an area that currently does not have any such stores. The chain will open if there is evidence that more than 5,000 of the 20,000 households in the area are equipped with Blu-ray players. It conducts a telephone poll of 300 randomly selected households in the area and finds that 96 have Blu-ray players. State the test of hypothesis that is of interest to the rental chain.
A) H0 : 5,000 versus H1 : > 5,000 B) H0 : 5,000 versus H1 : > 5,000
C) H0 : 0.32 versus H1 : > 0.32 D) H0 : 0.25 versus H1 : > 0.25
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