pproximately 68% of the values in a normal distribution fall within 1 standard deviation of the mean, approximately 95% of the values fall within 2 standard deviations of the mean, and approximately 99.7%
Empirical rule
pproximately 68% of the values in a normal distribution fall within 1 standard deviation of the mean, approximately 95% of the values fall within 2 standard deviations of the mean, and approximately 99.7%
Empirical rule
A normal distribution, or bell-shaped distribution, has the following characteristics:
Characterictic of normal distribution