hypotheesis testing

1)For a sample of 400 firms, the relationship between corporate revenue (Yi) and the average years of experience per employee (Xi) is modeled as follows: Yi = β1 + β2 Xi + εi, i = 1, 2,...,400 You wish to test the joint null hypothesis that β1 = 0 and β2 = 0 at the 95% confidence level. The...