Eight Practice Problems -- Normal Distribution

1 standard deviation of the mean. * About 95.4% of the data in a normally. distributed data set will fall within. 2 standard deviations of the mean. * About 99.7% of the data in a normally. distributed data set will fall within. 3 standard deviations of the mean. Example: The SAT is scored so that its mean is 500 and its standard deviation is 100. ................
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