Mathematics, 17.06.2021 07:50 bellc42069
A statistics class of 25 students took a test out of 100 points, and the class average was a 79 with a standard deviation of 8 points.
a) How many standards deviations from the mean is a student who scored a 91?
b) How many standards deviations from the mean is a student who scored a 72?
c) If a student scores a 72, what percent of the class scored better on the test? (Round to the nearest tenth of a percent)
d) What percent of students scored in between a 72 and 91 on the test (Round to the nearest tenth of a percent)
Answers: 3
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