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Scores of an IQ test have a​ bell-shaped distribution with a mean of 100 and a...

Scores of an IQ test have a​ bell-shaped distribution with a mean of 100 and a standard deviation of 16 . Use the empirical rule to determine the following.

​(a) What percentage of people has an IQ score between 52 and 148 ​?

​(b) What percentage of people has an IQ score less than 84 or greater than 116 ​? ​

(c) What percentage of people has an IQ score greater than 116 ​?

Math   Statistics-And-Probability   
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