Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 13. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 87 and 113? (b) What percentage of people has an IQ score less than 61 or greater than 139? (c) What percentage of people has an IQ score greater than 113? (a) % (Type an integer or a decimal.) (b) % (Type an integer or a decimal.) (c) [% (Type an integer or a decimal.)

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