Don't throw out the baby with the bath water just yet. Note that even though
your first model is insignificant, the R-squared is very high. This is
because you fit the whole model with intercept and three coefficients on 1
degree of freedom. You need to first import the data, then run the model,
an
Lucas
This problem is very old --- older than keypunches. There are several
methods for selecting variables (forward, backwards, both, all subsets)
using a variety of criteria (p-values, R^2, adjusted R^2, Cp, AIC, BIC,
and more). Be sure you understand the methods, especially the tendency to
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