Scores on the Stanford-Binet IQ test have a bell-shaped distribution with mean = 100 and standard deviation = 16.
a. Use the Empirical Rule to specify the intervals into which 68%, 95%, and 99.7% of Stanford-Binet IQ scores fall.
b. Draw a picture similar to given Figure illustrating the intervals found in part (a).
c. What is the variance of Stanford-Binet IQ scores?
