If the scores from an intelligence test are normally distributed,then you would predict that the FEWEST number of people would receive an IQ score at or below _____ on that test.

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Quizplus · Accepted Answer

The normal distribution is symmetrical around the mean, which is set at 100 for IQ tests. The standard deviation for most IQ tests is 15 points. Therefore, the score of 70 is two standard deviations below the mean (100-2*15), which is the point where only 2.28% of people would score at or below. This is the point on the distribution where the fewest number of people would receive an IQ score at or below.

If the Scores from an Intelligence Test Are Normally Distributed,then