(8) A researcher believes that the percentage of people who exercise inCalifornia is greater than the national exercise rate. The national rate is20%. The researcher gathers a random sample of 120 individuals who live inCalifornia and finds that the number who exercise regularly is 31 out of 120.a. What is X2obt?b. What is df for this test?c. What is X2cv?d. What conclusions shouldbe drawn from these results?
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