Question

A manager of a campus store that sells posters conjectures that more than 30% of all freshman dorm rooms have a poster of a rock group. From n = 60 rooms selected at random, an investigator will record X = number of rooms having a poster of a rock group

1. (a) Formulate a null and alternative hypotheses for verifying the conjecture.

2. (b) Select a rejection region for which α ≤ 0.05.

3. (c) If p = 0.4, what error can be made? Explain in words in the context of the problem

4. (d) What is the conclusion of your test if you observe 25 rooms having a poster of a rock group?

Answer 1