Use the following information to answer the question. A researcher is wondering whether the drinking habits of adults in a certain region of the country are in the same proportion as the general population of adults. Suppose a recent study stated that the proportion of adults who reported drinking once a week or less in the last month was 0.26. The null hypothesis for this test is H 0 : p = 0.26 and the alternative hypothesis is H a : p

Question

Use the following information to answer the question. A researcher is wondering whether the drinking habits of adults in a certain region of the country are in the same proportion as the general population of adults. Suppose a recent study stated that the proportion of adults who reported drinking once a week or less in the last month was 0.26. The null hypothesis for this test is H 0 : p = 0.26 and the alternative hypothesis is H a : p < 0.26. The researcher collected data from 150 surveys he handed out at a busy park located in the region.
-Check that the conditions hold so that the sampling distribution of the z- statistic will approximately follow the standard normal distribution. Are the conditions satisfied? If not, choose the condition that is not satisfied.
A)No, the researcher did not collect a large enough sample.
B)No, the population of interest is not large enough to assume independence.
C)Yes, all the conditions are satisfied.
D)No, the researcher did not collect a random sample.

Quizplus · Accepted Answer

The sample was collected at a busy park, which may not be representative of the entire population, indicating a lack of randomness.

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