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totalmat
2013 Feb 25
1
quesion about SS of ANOVA
..._dat1 equals to SS_g1_dat2?
I have both "yes" and "no" reasons for the quesion,but don't know which one is correct,which need your precious help.
The reasion for SS_g1_dat1 equals to SS_g1_dat2:
The formula for computing SS is:sum(sample size of level(i)*(mean of level(i)-TotalMean)^2),with i refers to each level in SS_g1_dat1 and SS_g1_dat2.
Every element of the formula is constant,so SS is constant.
Using the dataset "warpbreaks" from R:
anova(lm(breaks~wool))
Analysis of Variance Table
Response: breaks
Df Sum Sq Mean Sq F value Pr(>F)
wool 1...