The correlation between Stanford-Binet IQ scores and Wechsler Adult Intelligence Scale (WAIS) IQs is about .80. Both tests have a mean of 100. The standard deviation on older versions of the Stanford-Binet was 16.
For the WAIS, S = 15. What WAIS IQ do you predict for a person who scores 65 on the Stanford-Binet? Write a sentence summarizing these results.
(An IQ score of 70 has been used by some schools as a cutoff point between regular classes and special education classes.)