问题如下：
Jenny wants to predict the tax revenue of her country, then she selects GDP Fiscal expenditure and RPI ( Retail Price Index) as three independent variables and gets the following results:
If given this year’s GDP is 104790.6, Fiscal expenditure is 22053.15 and RPI is 98.7.
What is the predicted value of the tax revenue this year?
选项：
A.15374.981
B.16753.342
C.17571.233
解释：
C is correct.
考点: Interpret Regression Coefficient, Assumptions and F-test.
解析: 由题干的表格可知，该多元回归方程为TR=0.022GDP+0.702FE+23.985RPI-2582.791，代入题干的所给的今年的数据，可以得到今年预测的Tax Revenue为17571.233。选择C选项。
老师这个t估计量都很离谱啊，按理来说应该都落到了拒绝域里面了，所以这个回归模型的系数都不靠谱，应该就不能估计才对啊？
