Question

In a normal distribution of Stanford-Binet IQ scores, approximately two-thirds of the IQ scores fall within which of the following ranges?

a. 85-115
b. 70-100
c. 100-130
d. 90-110

Answer 1

In a normal distribution of Stanford-Binet IQ scores, approximately two-thirds of the IQ scores fall within the range of 85-115

Step-by-step explanation:

In a normal distribution of Stanford-Binet IQ scores, approximately two-thirds of the IQ scores fall within one standard deviation of the mean. The mean IQ score is 100 and the standard deviation is 15. Therefore, the IQ scores will fall within the range of 85-115 (one standard deviation below and above the mean).