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OpenStudy (pphalke):
IQ scores are normally distributed with a mean of 100 and a standard deviation of 15 A. What percent of IQ scores are between 85-115? B. What percent of IQ scores are between 70-130? C. What percent of IQ scores are between 55-145?
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jimthompson5910 (jim_thompson5910):
hint: empirical rule http://images.tutorvista.com/cms/images/113/empiricle-rule.png
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