Chapter 15

Thus, if a particular set of scores has a mean of 38 and a standard deviation of 6, and is roughly normally distributed, about 95% of the scores would fall between 26 (two standard deviations below the mean) and 50 (two standard deviations above the mean). If the standard deviation were 15, the bulk of the scores would range from 8 to 68. If ... ................
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