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OpenStudy (anonymous):
The grades on the last science exam had a mean of 89%. Assume the population of grades on science exams is known to be distributed normally, with a standard deviation of 14%. Approximately what percent of students earn a score between 75% and 89%?
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OpenStudy (anonymous):
38.5% 15.7% 50% 34.1%
OpenStudy (anonymous):
I know i have to use the z score to find the answer.. but im not sure what to use for z or x
OpenStudy (anonymous):
|dw:1440090658200:dw|
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