Level 2 Scheswer Notes Book1 第220页 说: Residual (error) = actual value - predicted value = 82.4 - 81.9 = 0.5 可是下面一句马上说,since the predicted value is less than the actual, measured value, the error term is negative. 可是,是actual - predicted的话,predicted < actual, 不是应该是positive的么..... 这应该是notes写错了吧?(虽然只是个小问题,可是保险起见还是想跟大家确认一下) |