Probability Plots

The data (AGEDEATH) used in this example can be found in the Minitab folder under STUDNT14. The first three lines of the data are below.

Day	Month	Gender	Birthplace	Age
3	1	Male	MA	87
5	1	Male	NJ	83
31	12	Male	NY	42
.	.	.	.	.

Go to Stat à Probability Plot and the following window should appear.

Click on the graph entitled Single. Click O.K. The following window should appear.

  Enter the variable in the Graph Variables space. In this case, I entered Age. Click o.k. You will get the following graph.

This data set is not Normally distributed, because the data points do not appear to follow a straight line. There appear to be a few outliers in the data set.