Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 17. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 66 and 134? (b) What percentage of people has an IQ score less than 66 or greater than 134? (c) What percentage of people has an IQ score greater than 151?
Solution by empirical rule
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