Displaying 1 result from an estimated 1 matches for "diamevdettol".
2011 Mar 14
0
Non-constancy of variances in mixed model.
...fect, so
I'm analysing differences between two groups, a bit like a t.test or
anova, but without riddiculous degrees of freedom. I've done qqPlots()
and normality tests on my data, according to shapiro.test() on both my
subsets (I split the data into the two groups):
> shapiro.test(DiamEVDettol)
Shapiro-Wilk normality test
data: DiamEVDettol
W = 0.9823, p-value = 0.0221
> shapiro.test(DiamNEDettol)
Shapiro-Wilk normality test
data: DiamNEDettol
W = 0.9788, p-value = 0.007677
> qqPlot(DiamEVDettol, dist="norm")
> qqPlot(D...