Question

Scores on the Wechsler Adult Intelligence Scale(a standard IQ test) for the 20 to 34 age group are approximately bell shaped symmetrical with a mean of 110 and standard deviation of 25. Use the empirical rule to answer the following questions.

a. the scores of the middle 68% of all people lie between what two values?

b. the scores of the middle 95% of all people lie between what two values?

c. the scores of the middle 99.7% of all people lie between what two values?

d. what percent of all people score below 60?

e. what percent of all people score above 135?

f. what percent of all people score between 85 and 135?

Answer 1