As shown in Example 6.8, IQ scores are considered normally distributed, with a mean of 100 and

Question:

As shown in Example 6.8, IQ scores are considered normally distributed, with a mean of 100 and a standard deviation of 16.
a. Find the probability that a randomly selected person will have an IQ score between 100 and 120.
b. Find the probability that a randomly selected person will have an IQ score above 80.