Any normal distribution follows Empirical Rule.

Question

Empirical Rule (fill in the missing parts)

About 68% of values fall within
standard deviation from the mean.
About
% of the values fall within two standard deviations from the mean.
Almost all of the values—about 99.7%—fall within
standard deviations from the mean.

Answer 1

The Empirical Rule, also known as the 68-95-99.7 rule, states the following for a normal distribution:

• About 68% of values fall within 1 standard deviation from the mean.
• About 95% of the values fall within two standard deviations from the mean.
• Almost all of the values—about 99.7%—fall within 3 standard deviations from the mean.