The area from two standard deviations above to two standard deviations below the mean of a normal distribution will contain 99.7% of all of the area under the curve.

Question

Quizplus · Accepted Answer

The area from two standard deviations above to two standard deviations below the mean of a normal distribution actually contains about 95.4% of the area under the curve. The 99.7% figure refers to three standard deviations from the mean.

The Area from Two Standard Deviations Above to Two Standard