The Intelligence Quotient (IQ) Test Scores Are Normally Distributed with a Mean

Multiple Choice

The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a
Standard deviation of 15.
i. What is the probability that a person would score 130 or more on the test?
ii. You enrolled in a class of 25 students. What is the probability that the class' average IQ exceeds
130?

A) 0.0228, 0.4987
B) 0.4772, 0.300
C) 0.4772, 0.0026
D) 0.0228, approximately zero