NO.PZ202306130100003103
问题如下：
If the ratio of net income to sales for a restaurant is 5 percent, the predicted ratio of cash flow from operations (CFO) to sales is closest to:
选项：
A.
−4.054.
B.
0.524.
C.
4.207.
解释：
C is correct. To make a prediction using the regression model, multiply the slope coefficient by the forecast of the independent variable and add the result to the intercept. Expected value of CFO to sales = 0.077 + (0.826 × 5) = 4.207.
请问，计算的时候如何考虑残差项？
