SOLUTION: The scores on a psychology exam were normally distributed with a mean of and a standard deviation of . A failing grade on the exam was anything 2 or more standard deviations below
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Question 1178110: The scores on a psychology exam were normally distributed with a mean of and a standard deviation of . 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?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
2 standard deviations below the mean is 2.28% of the group. The cutoff is not able to be determined without the scores, but it is the mean-2sd.
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