Question: 3.133 The test scores for a large statistics class have an unknown distribution with a mean of 70 and a standard deviation of 10. a.

3.133 The test scores for a large statistics class have an unknown distribution with a mean of 70 and a standard deviation of 10.

a. Find k so that at least 50% of the scores are within k standard deviations of the mean.

b. Find k so that at most 10% of the scores are more than k standard deviations above the mean.

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