Properties of a Normal Curve

Colin Mix

Empirical Rule

above the mean, the empirical rule or the 68-95-99.7 rule. tells us that there is a 99.7% chance of finding a result in a. normal distribution that is within three standard. deviations of the mean.

Control Chart

The control chart is a graph used to study how a process changes over time. Data are plotted in time order. A control chart always has a central line for the average, an upper line for the upper control limit and a lower line for the lower controllimit. These lines are determined from historical data.

Control Chart

On a control chart if a bunch of points are over or under the 2nd standard deviation it is not normal