28.3 Max value of between.var if only 10 can be tested.

p <- power.anova.test(groups = 3, between.var = NULL,
                      within.var = mean(sds*sds),
                      sig.level = .05,
                      power = .8, n = 10)
p

## 
##      Balanced one-way analysis of variance power calculation 
## 
##          groups = 3
##               n = 10
##     between.var = 653
##      within.var = 1210
##       sig.level = 0.05
##           power = 0.8
## 
## NOTE: n is number in each group

• The interpretation here is that the max variance between groups than can be determined is 652.89.
• Note this is a σ of the group means of 18.07
• This can be difficult to interpret, but can be examined in the context of two groups being the same and one being something else