Dot 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
.	.	.	.	.

Single variable

1.To make a dot plot of the data, go to the Graphs pull down menu and go down to dotplot.
The following window will appear. When you have only one sample, you click on simple with one y

2.When you have only one sample, you click on simple under one y. You will then get the following screen.

3.To make a dotplot of the Age of death of the people in the data set. Type in C5 in the graph variables box. Click o.k. You will get the box below.

Two samples plotted on the same scale

1.To make a separate dotplot for each gender, but with the same scale, go to the graph pull down menu and select dotplots. This time click on a different graph. You should click on the graph under one y, that says with groups.Click o.k.

2.This time click on a different graph. You should click on the graph under one y, that says with groups. Click o.k. A new window will appear.

3.Your response variable (It has to be quantitative) goes in the graph variables space and your explanatory variable (It has to be qualitative) goes in the categorical variable space. Click on o.k. For this data set, you will get the below graphs.

4.There are three divisions in this case: one for male, one for female and one person is in a group by themselves. This person does not have a gender marked in the data set.