R help - Feb 2013 - Question about NLS model

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?

New to R. Thanks.

	[[alternative HTML version deleted]]

> 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

*******************************************************************
This email and any attachments are confidential. Any use...{{dropped:8}}