I. (60％)MULTIPLE CHOICE QUESTION
 所有的答案請寫在答案卷，答案寫法如下列所示: All answers must be written on the answer sheet for example:
  
  1. Which of the following statement on a simple OLS regression functionis true ?
(A) Coefficient of determinationR ²  is equal to the correlation coefficient of the sample value X and Y .
(B) More samples necessarily leads to a lower
(C)is always greater than
(D)Under the same significant level, if is significantly greater than zero, then is also significantly greater than zero.