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anonymous
 one year ago
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 689599.7% rule to determine what percentage of the test group had a diastolic pressure between 72mm and 92mm of mercury.
anonymous
 one year ago
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 689599.7% rule to determine what percentage of the test group had a diastolic pressure between 72mm and 92mm of mercury.

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jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2draw the normal bell curve dw:1444168819721:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2at the center is the mean 82 dw:1444168888474:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2plot 72 and 92 on there as well dw:1444168948036:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2with me so far?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2how far is 72 from 82?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2yes, and because we have a `standard deviation of 10mm`, this means that 72 is ONE full standard deviation away from the mean dw:1444169140982:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.292 is also ten units away from the mean of 82 92 is 1 standard deviation away from the mean dw:1444169186031:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2the `689599.7% rule`says that roughly 68% of the entire distribution is within 1 standard deviation. This shaded region has an area of roughly 0.68 dw:1444169247011:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2`689599.7% rule` or `empirical rule` http://www.oswego.edu/~srp/stats/6895997.htm

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ahh, thank you so much! @jim_thompson5910
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