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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 Data Science & Statistics by Bronze Status (8,650 points) | 1,345 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.
by Wooden (2,710 points)

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