Expert Answer - State the name and alternate hypotheses

We are testing people to see if the rate of use of seat belts has decreased from a previous value of 80%. Suppose that in our random sample of 100 people, we see that 72 have the seat belt fastened. The researcher is interested in a = 0.1 level test.

Step 1. State the name and alternate hypotheses.

Step 2. Write down the appropriate test statistics (formula) and the rejection region of your test (report z critical (s)

Step 3. Compute the value of the test statistics. (z observed).

Step 4. State your conclusion (in one sentence, state whether or not the test rejects the null hypothesis and in another sentence apply the results to the problem).
Step 5. Compute the p-value for this test. State your decision

 
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