To add a distribution fit
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1    Do one of the following:

·    Click on the graph editing toolbar and choose Distribution Fit from the Add List.

·    Right-click the active graph and choose Add > Distribution Fit.

·    Choose Editor > Add > Distribution Fit.

2    From Distribution, choose a distribution.

3    In Historical parameters, enter historical estimates of the distribution parameters. Minitab displays the necessary parameters, which depend on the chosen distribution. These parameters may include Mean, Standard Deviation, Location, Shape, Scale, or Threshold. If you do not enter historical estimates, Minitab estimates the parameters from the data. You can enter some historical estimates and have Minitab estimate the other parameters. See Distribution parameters for restrictions.

4    Click OK.