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Scores on a certain standardized test have a mean of 500, and a standard deviation of 100. How common is a score between 600 and 700?
in Statistics Questions by Silver Status (25.1k points) | 162 views

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500+2(100) =700

500-2(100) =200

within 2 standard of deviation is considered common and the common scores are between 200 and 700 which implies that scores between 500 and 700 are also common considering the empirical rule.
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