Need Help urgently - evaluating regressor using R

Hi there,

Could anybody out there advise me the code to evaluate the contribution of each regressor to the model using the t-test with 5% significance level.

Here are the co-efficients of the regressors.

               pitch
            0.841000
Temp     1394.250000
Soaktime    3.557340
Soakpct     0.923800
Difftime    0.952730
Diffpct     0.678350
pitch       0.026429

Not sure if the data is enough to do the evaluation or you need the full data set.  

Your help on this is most appreciated.

Thank you.
Karen