【单选题】下列哪一项是非技术关系中最重要的内容是( )
【简答题】根据()为最小的原则来确定回归系数,称为最小二乘原则。
【判断题】最小二乘原理是指使 达到最小值的原则确定样本回归方程
【单选题】DEFAULT:
C.
fulfill one's obligations
D.
maintain one's composure
E.
hoard one's possessions
【单选题】It is better to die on one's feet than ______.
B.
to live on one's knees
D.
to live at one's knees
【简答题】算术平均值原理、最小二乘原理、最小中误差原理?三者存在着什么关系?
【单选题】Foods rich in Vitamin A are said to be good for______.