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Approximately what percent of the population scores between 70 and 130 on the WISC?

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(@aamir)
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Approximately what percent of the population scores between 70 and 130 on the WISC?

(A) 34
(B) 50
(C) 68
(D) 84
(E) 95

Spoiler
Answer
(E) 95

Spoiler
Explanation
Approximately 95 percent of the population scores between 70 and 130 on the WISC. The WISC has a mean of 100 and a standard deviation of 15, which means that the scores between 70 and 130 represent all the scores within two standard deviations of the mean. By definition, in a normal distribution, about 95 percent of scores fall within two standard deviations of the mean.

 
Posted : 25/04/2024 5:20 pm
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