If scores on an exam have a mean of 50,a standard deviation of 10,and are normally distributed,approximately 95 percent of those taking the exam would be expected to score between

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Quizplus · Accepted Answer

In a normal distribution, approximately 95% of the data falls within two standard deviations from the mean. Here, the mean is 50 and the standard deviation is 10, so two standard deviations is 20. Therefore, 95% of scores would fall between 50 - 20 = 30 and 50 + 20 = 70.

If Scores on an Exam Have a Mean of 50,a