Question: Professor Avanti's Stats testThe probability density function for a uniform distribution ranging between 3 and 7 is scores, distributed normally, had a mean of 76.

Professor Avanti's Stats testThe probability density function for a uniform distribution ranging between 3 and 7 is scores, distributed normally, had a mean of 76. He says that only 13% of the class scored 90 or more and will get an A. What was the standard deviation of the test scores

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