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Mathematics 9 Online
OpenStudy (anonymous):

STATISTICS: In a study of 500 men, diastolic blood pressure was found to be approx. normally distributed, with a mean of 82mm of mercury and a standard deviation of 10mm. Question: Use the 68-95-99.7% rule to determine what percentage of the test group had a diastolic pressure between 72mm and 92mm of mercury.

jimthompson5910 (jim_thompson5910):

draw the normal bell curve |dw:1444168819721:dw|

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