One property of normally distributed data is that 99.7 percent of all possible observations of process output occur within plus-or-minus standard deviations of the process mean.

Question

Quizplus · Accepted Answer

This is true and is part of the 68-95-99.7 rule, which states that approximately 68% of the data falls within one standard deviation of the mean, 95% falls within two standard deviations, and 99.7% falls within three standard deviations.

One Property of Normally Distributed Data Is That 99