6.9 In Exercise 5.25 we expressed the model
Y = aK^b2L^b3E^b4M^b5exp{e}
in terms of logarithms and estimated it using data in the file manuf.dat. Use the data
and results from Exercise 5.25 to test the following hypotheses:
(a) H0 :b2= 0 against H1 :b2 不等於 0:
(b) H0 :b2= 0, b3 ¼ 0 against H1 :b2 不等於 0 and/or b3 不等於 0.
(c) H0 :b2= 0, b4 ¼ 0 against H1 :b2 不等於 0 and/or b4 不等於 0:
(d) H0 :b2= 0, b3 ¼ 0; b4 ¼ 0 against H1 :b2 不等於 0 and/or b3 不等於 0 and/or b4 不等於 0.
(e) H0 :b2 + b3 + b4 + b5= 1 against H1 :b2 + b3 + b4 +b5 不等於 1.
(f) Analyze the impact of collinearity on this model.