Question

What does the empirical rule say?

Answer 1

The Empirical Rule or the 3-sigma rule states that for a Normal Probability Distribution, most of the data would lie within 3 standard deviations of the mean.
The rule depicts that :

• 68% of the data will lie within the first standard deviation($\sigma$),
• 95% within the first two standard deviations($2\sigma$), and
• 99.7% will fall within the first three standard deviations($3\sigma$) of the distribution's mean.

2A 3 2-35