The Intelligence Quotient (IQ)test Scores for Adults Are Normally Distributed

Multiple Choice

The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of 100 and a population standard deviation of 15. What is the probability we could select a sample of 50 adults and find the mean of this sample is less than 95?

A) 0.0091
B) 0.9818
C) 0.4909
D) 0.9544