Question

A 9-year-old who responded to the original Stanford-Binet with the proficiency of an average 12-year-old was said to have an IQ of:_______.

a. 75.
b. 115.
c. 125.
d. 133.

Answer 1

d. 133

Step-by-step explanation:

IQ = (mental age/chronological age) x 100

= (12/9) x 100

= 133