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The mean score of a placement exam for entrance into a math class is​ 80, with a standard deviation of 10. Use the empirical rule to find the percentage of scores that lie between 60 and 80.​ (Assume the
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The mean score of a placement exam for entrance into a math class is​ 80, with a standard deviation of 10. Use the empirical rule to find the percentage of scores that lie between 60 and 80.​ (Assume the data set has a​ bell-shaped distribution.)

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Answer:

47.5%

Explanation:

User Monsy
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