2. Which of the following hypotheses about the coefficients can be tested using a I-test? Which of them can be tested using an F-test? In each case, state the number of restrictions; (a) He 1 :33 = 2 (b) Hui3+4=1 (C) Helm-H34 213115135 =1 (d) l-L, : g 2 (land3 = (Jand 54 = Oandg = 0 (5) Hi} 1 zs = 1 3. Which of the above null hypotheses constitutes 'THE' regression Fstatistic in the context of (4.53)? Why is this null hypothesis always of interest Appendix $2 177 whatever the regression relationship under study? What exactly would constitute the alternative hypothesis in this case