statistics: the percentage of people who exercise in California

mariska1968

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Aresearcher believes that the percentage of people who exercise in California isgreater than the nation exercise rate. the national rate is 20%. The researchergathers a random sample of 120 individuals who live in California and findsthat the number who exercise regularly is 31 out of 120.
a. a. What is the x² obt?
b. b. What is df for this test?
c. c. What is x² cv?
d. What conclusion should be drawn from these results?
 
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