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
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
- 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
- 若a＞1，b＞1，且lg（a+b）=lga+lgb，则lg（a-1）+lg（b-1）的值（ ）
- In<br/>the previous question, by what factor doesthe<br/>pressure of the gas changes?() A: a<br/>factor of 9, B: a<br/>factor of 3, C: a<br/>factor of √3, D: a<br/>factor of 1, E: a<br/>factor of 1/3
- a,b,c为正数,a+b+c=1证:(1)(1/a+1)(1/b+1)(1/c+1)>=64(2)(1/a-1)(1/b-1)(1/c-1)>=8
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