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6.(10) Scores on a standard IQ test are normally distributed with mean 100 and standard deviation 15. Use the Empirical Rule and make a

6.(10) Scores on a standard IQ test are normally distributed with mean 100 and standard deviation 15. Use the Empirical Rule and make a sketch for each problem. What percent of the population have IQs a) below 70? b) between 70 and 115? c) above 145?

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