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Question: 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 isobt?

b. What is df for this test?

c. What iscv?

d. What conclusion should be drawn from these results?

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