corylangham corylangham

16-07-2018
Mathematics

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Scores on an exam are normally distributed with a mean of 76 and a standard deviation of 10. In a group of 230 tests, how many students score within one standard deviation of the mean?

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mckenzie2120288 mckenzie2120288

23-07-2018

I think its 156.4, based on the 68% rule

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