[R] Question about NLS model

[S Ellison]

> After applying the NLS for a model like y=exp(a*x), and I get 
> a result showing the summary as:
> Estimate Std. Error t value Pr(>|t|)
> 2.6720     1.4758   1.811   0.3212
> 
> My question is what this t-statistics tests? And what's the 
> meaning of Pr?
t is (estimate/std.err) and can be used to test the null that the coefficient is 0.
Pr is the corresponding p-value; the fact that it says "> |t|" indicates the number of tails.

S

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