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29-11-2022
Mathematics

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Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 20. Use the empirical rule to determine the following.

(a) What percentage of people has an IQ score between 40 and 160?
(b) What percentage of people has an IQ score less than 80 or greater than 1207
(c) What percentage of people has an IQ score greater than 1607

(Type an integer or a decimal.)

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