关于Regression Analysis Error Term的问题 positive, actual, error, Error, 保险

himawari

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）

apf_jingrui_li

Note that since the actual, measured value is greater than the predicted value of y for
2004.1, the error term is positive. Had the actual, measured value been less than the
predicted value, the error term would have been negative.

This is how they say it, I see no mistake here.