Empirical Rule

Question

Approximately what percent of the values in a sample are within (plus or minus) 2 standard deviations of the mean using the empirical rule?

Answer 1

47.72% of data lies within two standard deviations above the mean.

47.72% of data lies within two standard deviations below the mean.

 

95.44% lies within two standard deviations above and below the mean.