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Scores of an IQ test have a​ bell-shaped distribution with a mean of 100100 and a...

Scores of an IQ test have a​ bell-shaped distribution with a mean of 100100 and a standard deviation of 2020. Use the empirical rule to determine the following.

​(a) What percentage of people has an IQ score between 8080 and 120120​?

​(b) What percentage of people has an IQ score less than 4040 or greater than 160160​? ​

(c) What percentage of people has an IQ score greater than 160160​?

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