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Intelligence Quotients (IQ) are approximately normally distributed with a mean of 105 and standard deviation of 10. Use the following density curve and 68-95-99.7% rule

Intelligence Quotients (IQ) are approximately normally distributed with a mean of 105 and standard deviation of 10. Use the following density curve and 68-95-99.7% rule to find the approximate proportion of people who has IQs between 75 and 125? a. 0.9500 b. 0.9735 c. 0.9470 d. 0.6800 e. 0.9970

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