R help - Mar 2009 - statistical question: confidence interval of regression weight - significance

hi,

at first; thanks for the help on getting confidence intervals in R.



now I have a pure statistical question.
I hope you don't mind if I ask ...


I have an expectation of how large my beta-weight in a regression  
should be - so I have an "ideal" or expected regression line.

Now the real beta-weight is less then the expected and when I draw the  
confidence interval lines above and below the estimated line, the  
expected regression line is outside of the confidence intervals at the  
near end and the beginning of the x-scale.

Can I say know that the empirical beta-weight is significantly  
different from the expected beta weight?

Or is there a test (perhaps implemented in R) that can tell how the  
probability is that the estimated (empirical) beta-weight comes from a  
population where the beta-weight is equal the expected?



thanks for any help!