Characteristics of the Normal Distribution

1. Mode, Median and Mean are the same or similar.

2.  99.8% of the cases are between 3 standard deviations.

3.  95% of the cases are between 2 standard deviations.

4.  68.2% of the cases are between 1 standard deviations.

Central Limit Theorem:  Most distributions approach normality when there are more than 100 cases.