Interval Plot - Multiple Y's, Simple
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Graph > Interval Plot > choose Multiple Ys - Simple > OK

Stat > ANOVA > Interval Plot > choose Multiple Ys - Simple > OK

Use to display interval plots of multiple variables on the same graph.   

Dialog box items

Graph variables: Enter one or more columns of data to plot. Minitab displays all columns on the same graph.

<Scale>

<Labels>

<Data View>

<Multiple Graphs>

<Data Options>