两因子析因设计中,若因子A有a个水平,因子B有b个水平,则因子A、因子B以及AB交互作用的自由度各是多少?
A: a;b;ab
B: a-1;b-1;(a-1)(b-1)
C: a-1;b-1;ab
D: a-1;b-1;ab-1
A: a;b;ab
B: a-1;b-1;(a-1)(b-1)
C: a-1;b-1;ab
D: a-1;b-1;ab-1
举一反三
- In a two-factor factorial design, suppose factor A has a levels and factor B has b levels. What are the degrees of freedom for factor A, factor B, and the interaction between factor A and B? A: a;b;ab B: a-1;b-1;(a-1)(b-1) C: a-1;b-1;ab D: a-1;b-1;ab-1
- 若a>1,b>1,且lg(a+b)=lga+lgb,则lg(a-1)+lg(b-1)的值( )
- 设A,B都是n阶可逆方阵,则下述结论中不正确的是______ A: (A+B)-1=A-1+B-1 B: [(AB)T-1=(A-1)T(B-1)T C: (Ak)-1=(A-1)k(k为正整数) D: |(kA)-1|=k-n|A|-1(k为任意非零常数)
- 中国大学MOOC: 两因子析因设计中,若因子A有3个水平,因子B有4个水平,则因子A、因子B以及AB交互作用的自由度各是多少?
- 证明:如果(G,°)是群,则对每个a,b∈G有:(a°b)-1=b-1°a-1。