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QUESTION
Assume that a set of test scores is normally distributed with a mean of 80 and a standard deviation of 20. Use the 68-95-99.7 rule to find the
Assume that a set of test scores is normally distributed with a mean of 80 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities. How do I solve this step by step?
