在方差分析中,()反映的是样本数据与其组平均值的差异。
A. 总误差平方和
B. 组间误差平方和
C. 组内误差平方和
D. 抽样误差
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单因素方差分析的原假设是所有均值均不相等。
A. 对
B. 错
在双因素方差分析中,如果交互作用是显著的,则表明一个因素对因变量的影响受另一个因素取值的影响。
A. 对
B. 错
Directions: Choose the best answer from the four choices marked A, B, C and D.It's a pity the two concerts (); I wanted to go to both of them.
A. clash
B. crash
C. crush
D. collide
John's black eyes () rumors that he had been in a fierce fight.
A. contributed to
B. came to
C. gave rise to
D. attributed to