Gives the results of the LinearModel function. If a model selection is performed, the global F-test
for the complete model is first given, then all the results are given for the selected model
(global F-test, the F-tests for main effects and interaction, the t-tests)
if (FALSE) {
data(senso)
res <- LinearModel(Score~ Product + Day , data=senso)
res
res2 <- LinearModel(Score~ Product + Day , data=senso, selection="BIC")
res2
}