Although this method can be done by hand, it is not recommended.  This page shows the formulas to find the test statistic, though the values covered in previous lessons will be found using tools like Minitab or Excel.

For Testing b_k: 

test statistic:

*using your own t-table with in each tail and df = (n-p) = (7-4).

Using MS Excel   Using Minitab

Regression Tutorial Menu    Dictionary

STATS @ MTSU