NO.PZ202109130200004202
问题如下：
Based on the regression, if the CPIENG decreases by 1.0%, the expected return on Stellar common stock during the next period is closest to:
选项：
A.0.0073 (0.73%) B.0.0138 (1.38%) C.0.0203 (2.03%)解释：
C is correct. From the regression equation, Expected return = 0.0138 + (-0.6486 x -0.01) = 0.0138 + 0.006486 = 0.0203, or 2.03%.
题目中CPIENG有%，计算为何没有用-0.006486，或者用*1
即Expected return = 0.0138 + (-0.006486 x (-0.01) )
Or Expected return = 0.0138 + (-0.6486 x (-1))
