To display a bubble plot with groups
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1    Choose Graph > Bubble Plot.

2    Choose With Groups, and then click OK.

3    In Y variable, enter the column of y-values.

4    In X variable, enter the column of x-values.

5    In Bubble size variable, enter the column of values that determine the size (area) of the bubbles.

6    In Categorical variables for grouping, enter up to three columns of categorical variables for grouping. Minitab displays all groups on the same graph.

7    If you like, use any dialog box options.

8    Click OK.