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OpenStudy (anonymous):
The mean of the data is seven hours and the standard deviation is two. About what percentage of students have an amount of homework within the 2 standard deviations of the mean?about 51% about 78%about 67%about 92%
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OpenStudy (anonymous):
CAN SOMEONE HELP ME
OpenStudy (anonymous):
PLEASE !
OpenStudy (kropot72):
Reference to a calibrated normal distribution curve shows that 68.26% of the students have an amount of homework within +-1 standard deviation from the mean.
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