In a normal distribution, _____ of the observations fall within one standard deviation of the mean.

Question

Quizplus · Accepted Answer

By definition of a normal distribution, approximately 68.3% of observations fall within one standard deviation of the mean. This can also be remembered as the "68-95-99.7 rule," where approximately 68% fall within one standard deviation, 95% fall within two standard deviations, and 99.7% fall within three standard deviations of the mean in a normal distribution.

In a Normal Distribution, _____ of the Observations Fall Within