An education researcher claims that the mean high school 4-year graduation rate per state in the United
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An education researcher claims that the mean high school 4-year graduation rate per state in the United States is 83%.
You want to test this claim. You find that a random sample of 30 states has a mean high school 4-year graduation rate of 85%. Assume the population standard deviation is 3.9%. At a = 0.05, do you have enough evidence to reject the researcher’s claim?
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