To display a dotplot with multiple y's and stack groups
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1    Choose Graph > Dotplot.

2    Choose Multiple Y's - Stack Groups, then click OK.

3    In Graph variables, enter one or more columns of data. Minitab displays all columns on the same graph.

4    In Categorical variables for grouping (1-3, outermost first), enter one to three columns of grouping (categorical) variables. The first variable will be the outermost categorical variable and the last will be the innermost.

5    Under Scale Level for Graph Variables, choose one of the following:

·    Graph variables displayed outermost on scale to make the graph variables the outermost categories on the scale.

·    Graph variables displayed innermost on scale to make the graph variables the innermost categories.

6    If you like, use any dialog box options, then click OK.