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The mean score of a competency test is 70, with a standard deviation of S. Use the empirical rule to find the percentage of scores

The mean score of a competency test is 70, with a standard deviation of S. Use the empirical rule to find the percentage of scores botinen s5 and 85. Assume the data set has a bel-shaped distribution) CA 95% OB. 90.7% C 68% OD 50%

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