Mathematics, 02.08.2019 07:30, cdubble04

The scores on a psychology exam were normally distributed with a mean of 57 and a standard deviation of 9. a failing grade on the exam was anything 2 or more standard deviations below the mean. what was the cutoff for a failing score? approximately what percentage of the students failed?

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The scores on a psychology exam were normally distributed with a mean of 57 and a standard deviation...