If the scores on a particular test fit the normal bell shaped curve distribution, what percentage of scores should fall between +2 and - 2 standard deviations from the mean?

Question

Quizplus · Accepted Answer

On a normal bell shaped curve distribution, approximately 95% of the total number of scores falls within the boundaries of -2.0 and +2.0 standard deviations. The standard deviation serves as a yardstick indicating how far an individual's score on a particular area of functioning deviates from the mean, the average score.

If the Scores on a Particular Test Fit the Normal