Wechsler developed the deviation IQ based on the normal distribution. On his test, an overall IQ of 130 would mean
A)the person has 130 units of intelligence.
B)the person scored two standard deviations above the mean.
C)the person's MA is 13 and CA is 10.
D)the test score was calculated incorrectly, because 100 is the highest possible score.

Question

Wechsler developed the deviation IQ based on the normal distribution. On his test, an overall IQ of 130 would mean ​
A)the person has 130 units of intelligence.
B)the person scored two standard deviations above the mean.
C)the person's MA is 13 and CA is 10.
D)the test score was calculated incorrectly, because 100 is the highest possible score.

Quizplus · Accepted Answer

An overall IQ of 130 on the Wechsler scale indicates that the person scored two standard deviations above the mean, as the mean score is set at 100 and each standard deviation is set at 15 points.

Wechsler Developed the Deviation IQ Based on the Normal Distribution