Question 2 multiple choice worth 6 points)
(08.04 mc)
the grades on the last history exam had a mean of 80%. assume the population of grades on history exams is known to be distributed normally, with a standard
deviation of 5%. using the empirical rule, approximately what percent of students earned a score between 70% and 80%?
3.5%
5%
47.5%
95%
question 3
lehce worth 6p
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