3. A researcher wants to know whether people who regularly listen to radio talk shows are more or less likely to vote in national elections than people in general. a. State the research hypothesis and null hypothesis b. Would the researchers use a one- or two-tailed Z test?

Step-by-step explanation:

A. The null hypothesis is most of the time always the default hypothesis.

In this case study, the null hypothesis is people who regularly listen to radio talk shows vote in national elections as people in general.

While the alternative claim would be: people who regularly listen to radio talk shows are more or less likely to vote in national elections than people in general.

B. Since there are two options in the alternative claim: more or less, the researcher would use a two tailed hypothesis Z test. But if there is only one option, either more or less, then the researcher can use a one tailed Z test.