Let us consider yest as the estimated value of y for a given value of x. This estimated value can be obtained from the regression curve of y on x (see Linear regression ). From this, the measure of the scatter about the regression curve is supplied by the quantity:
The following table depicts the actual values of y and the estimated values of y (denoted by yest).
|y - yest||1.24||0.19||0.29||-1.28|