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Mathematics 18 Online
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.

OpenStudy (anonymous):

1 standard deviation in either direction is plus or minus 34.1 percent. You clearly have a standard deviation in both directions so you're percentage of adults with scores between 85 and 115 is 34.1% times 2.

OpenStudy (anonymous):

thanks

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