【单选题】In the ANOVA table for a multiple regression analysis, the value of k is the:
A.
regression sum of squares.
B.
total number of observations.
C.
total degrees of freedom.
D.
regression degrees of freedom.
【单选题】高考终于考上了,你会选择下面哪一句诗形容激动的心情?( ▲ ) 。
【单选题】放假时无法与家人团聚,你会用哪句诗来形容你的心情?
【单选题】To test the significance of individual regression coefficients:
B.
we test for differences between each pair of regression coefficients.
C.
we usually delete the variables where the null hypothesis is rejected.
D.
regression coefficients with a negative coefficient are deleted from the equation.
【判断题】劳动既是我国公民的一项基本权利,也是义务。
【判断题】劳动既是我国公民的一项基本权利,也是义务。()
【单选题】3mol 的理想气体开始时处在压强 p 1 = 6atm 、温度 T 1 = 500K 的平衡态.经过一个等温过程,压强变为 p 2 = 3atm. 该气体在此等温过程中吸收的热量为 :