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A researcher is wondering whether the drinking habits of adults in a certain region of the country ...

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 researcher's null hypothesis for this test is H₀: p = 0.26 and the alternative hypothesis is

The researcher collected data from a random sample of 75 adults in the region of interest.

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.

▸ No, the population of interest is not large enough to assume independence.

▸ Yes, all the conditions are satisfied.

▸ No, the researcher did not collect a large enough sample.

▸ No, the researcher did not collect a random sample.

Textbook

Introductory Statistics: Exploring the World Through Data

Edition: 2^nd

Authors: Gould, Ryan

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