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12 June, 07:14

How are average I. Q. s related to normal distributions?

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  1. 12 June, 08:50
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    A standard devation of 15 means 68% of the norm group has scored between 85 (100 - 15) and 115 (100 + 15). In other words, 68% of the norm group has a score within one standard deviation of the average (100). Also, 95% of the norm group has an IQ score within two standard deviations of the average

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