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The mean IQ score of adults is 100, with a standard deviation of 15. Use the Empirical Rule to find the percentage of adults with

The mean IQ score of adults is 100, with a standard deviation of 15. Use the Empirical Rule to find the percentage of adults with scores between 70 and 130. (Assume the data set has a bell -shaped distribution.)

Sample annual salaries (in thousands of dollars) for public elementary school teachers are listed. Find the sample standard deviation. 18.3 19.9 47.8 29.3 21.3 19.3

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