☆─────────────────────────────────────☆
attone (hehe) 于 (Wed Jan 23 12:43:03 2008) 提到:
This is an excercise which our teacher used in class. I really have
difficulty to fellow the proffessor. My understanding is that to test an
factor has no effect is the same as testing if the coefficent of it is zero.
But the professor has totally different answer.He added an variable named
nodose in the restricted model to test that dose has no effect on weight
loss. Sorry, I do not remember how he defin
