One basic proof does a lot of the work. You will see the details clearly laid out.
more (m,aybe)
Help for New Students Understanding Regression Models Estimating Regression Models Picking the Right Model Free Preview
The Best Case Scenario Estimation Assumptions Conclusions (xar) Testing
Violations of the Assumptions Regressors Errors Simultaneity A Proof Runs Through It
1, 2, 3 ___ Dummy Variables Logit/Probit
Economics
When is a t test equivalent to an F test?
When can you do an F test, but not a t test?
Why do they call it Student's t distribution? (Hint: it has something to do with beer.)
Pitfalls
R2: the real story