Stepwise Multiple Linear Regression
52
9
Stepwise Multiple Linear Regression
From Version 2 onwards, ECOM features forward and backward stepwise multiple
regression.
Forward Stepwise Regression
Backward Stepwise Regression
Load both your species and your environmental datasets as described and make your
selection from the drop down on the Regression menu.
9.1
Variable Selection
When using either 
forward
 or 
backward
 stepwise multiple regression a dialog box is
displayed to enable you to select the species against which you wish to test your
environmental variables. With forward stepwise regression, the dialog has boxes for
you to enter and adjust the minimum probabilities required to enter variables into the
model and to remove them again if they have little value (thereby preventing all
variables from being entered, and complicating the model).
Copyright 2004  PISCES Conservation Ltd





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