A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in California and finds that the number who exercise regularly is 31 out of 120.
· a. What is ÷2obt?
· b. What is df for this test?
· c. What is ÷2cv?
· d. What conclusion should be drawn from these results?
1 answer