Stepwise regression using p-values to drop variables with nonsignificant p-values

Question

I want to perform a stepwise linear Regression using p-values as a selection criterion, e.g.: at each step dropping variables that have the

Answer 1

Why not try using the step() function specifying your testing method?

For example, for backward elimination, you type only a command:

step(FullModel, direction = "backward", test = "F")

and for stepwise selection, simply:

step(FullModel, direction = "both", test = "F")

This can display both the AIC values as well as the F and P values.