The grades on the last history exam had a mean of 80%. Assume the population of grades on history exams is known to be normally distributed with a standard deviation of 5. What percent of students earn a score between 70% and 80%?

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Mathematics

Shyla Hart

12 October, 19:57

The grades on the last history exam had a mean of 80%. Assume the population of grades on history exams is known to be normally distributed with a standard deviation of 5. What percent of students earn a score between 70% and 80%?

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Elliana Everett · Answer 1

If the grades on the last history exam had a mean of 80%, then its is assumed that the population of grades on history exams is known to be normally distributed with a standard deviation of 5, then the percent of students who earn a score between 70% and 80% is. 477 or 47.7%.