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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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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?

User Sahil Chhabra
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I think its 156.4, based on the 68% rule

User Madtowneast
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