To overlay multiple empirical CDF graphs on the same page
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1    Choose Graph > Empirical CDF.

2    Choose Multiple, then click OK.

3    In Graph variables, enter one or more columns of data to plot. By default, Minitab plots each column on the same graph.

4    Do one or both of the following:

·    If graph variable columns contain multiple groups, enter up to three columns of categorical grouping variables in Categorical variables for grouping (0-3). (To panel by one or more variables, use By Variables.)

·    Check Graph variables form groups to display empirical cdf plots for all graph variables on the same graph. (To panel multiple graphs on the same page, use Multiple Variables.)

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