In a large lecture class the professor announced that the

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In a large lecture class, the professor announced that the scores on a recent exam were normally distributed with a range from 51 to 87. Using the Empirical Rule ? ± 3? to estimate ?, how many students would you need to sample to estimate the true mean score for the class with 90 percent confidence and an error of ± 2?

Reference no: EM13609212

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