(a) What percentage of people has an IQ score between 72 and 128​? ​(b) What percentage of people has an IQ score less than 72 or greater than 128​? ​(c) What percentage of people has an IQ score greater than 128​?

MATLAB: An Introduction with Applications
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ISBN:9781119256830
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Scores of an IQ test have a​ bell-shaped distribution with a mean of 100
and a standard deviation of 14.
Use the empirical rule to determine the following.
​(a) What percentage of people has an IQ score between
72 and 128​?
​(b) What percentage of people has an IQ score less than
72 or greater than 128​?
​(c) What percentage of people has an IQ score greater than
128​?
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