Mathematics, 19.09.2021 04:50, keegandudley

Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 11. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 78 and 1227
(b) What percentage of people has an IQ score less than 67 or greater than 133?
(c) What percentage of people has an IQ score greater than 122?

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