[R] How to read ANOVA output

[Stephen Liu]

Hi folks,


Where can I find document re "how to read anova output"?  Google found many of 
them.  But seemingly non of them can explain to me following output:-


> tabA = c(5.67, 5.67, 5.55, 5.57)
> tabB = c(5.75, 5.47, 5.43, 5.45)
> tabC = c(4.74, 4.45, 4.65, 4.94)
> tabs = data.frame(tabA, tabB, tabC)

> tablets = stack(tabs)


> anova(lm(values ~ ind, data = tablets))
Analysis of Variance Table
Response: values
      Df  Sum Sq   Mean Sq  F value  Pr(>F)
ind      2   2.05787  1.02893  45.239   2.015e-05 ***
Residuals 9   0.20470  0.02274
---
Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1


> TukeyHSD(aov(values ~ ind, data = tablets))
Tukey multiple comparisons of means
95% family-wise confidence level
Fit: aov(formula = values ~ ind, data = tablets)
$ind
        diff  lwr           upr      p adj
tabB-tabA  -0.09  -0.3877412   0.2077412  0.6866791
tabC-tabA  -0.92  -1.2177412  -0.6222588  0.0000321
tabC-tabB  -0.83  -1.1277412  -0.5322588  0.0000731


Please help.  TIA


B.R.
Stephen L