A researcher believes that the percentage of people who exercise in California is greater than the national

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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  obt 2 ?

b. What is df for this test?

c. What is  cv 2 ?

d. What conclusion should be drawn from these results?

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