Forward selection: This method starts with an empty model, or includes the terms you specified to include in the initial model or in every model.Minitab stops when all variables that are not in the model have p-values that are greater than the specified Alpha to enter value, and when all variables in the model have p-values that are less than or equal to the specified Alpha to remove value. You can specify terms to include in the initial model or to force into every model. Then, Minitab adds or removes a term for each step. Stepwise: This method starts with an empty model, or includes the terms you specified to include in the initial model or in every model.None: Fit the model with all of the terms that you specify in the Terms sub-dialog box.Specify the method that Minitab uses to fit the model.
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