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OpenStudy (anonymous):
Adult IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. Use the Empirical Rule to find the percentage of adults with scores between 85 and 115.
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OpenStudy (amistre64):
mean = 100 sd = 15 115 is 15 away from the mean; 85 is 15 away from the mean 15/15 = 1 sd 64% or so is within 1sd of the mean
OpenStudy (amistre64):
err... 68% :)
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