IQ Scores Stanford Binet IQ scores have a mean of 100 and a standard deviation of 16. Albert Einstein reportedly had an IQ of 160.

a. What is the difference between Einstein’s IQ and the mean?

b. How many standard deviations is that [the difference found in part (a)]?

c. Convert Einstein’s IQ score to a z score.

d. If we consider “usual” IQ scores to be those that convert to z scores between 22 and 2, is Einstein’s IQ usual or unusual?