Empirical Rule

Front

What is the Empirical Rule?

Back

The Empirical Rule states that for a normal distribution, 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.

Front

What percentage of data is within 1 standard deviation of the mean?

Back

68%

Front

What percentage of data is within 2 standard deviations of the mean?

Back

95%

Front

What percentage of data is within 3 standard deviations of the mean?

Back

99.7%

Front

What percentage of data falls between the mean and 1 standard deviation above the mean?

Back

34%

Front

What percentage of data falls between the mean and 1 standard deviation below the mean?

Back

34%

Front

What percentage of data falls between 1 and 2 standard deviations above the mean?

Back

13.5%

Front

What percentage of data falls between 1 and 2 standard deviations below the mean?

Back

13.5%

Front

What percentage of data falls between 2 and 3 standard deviations above the mean?

Back

2.35%

Front

What percentage of data falls between 2 and 3 standard deviations below the mean?

Back

2.35%