I have 3 vectors which are unequal in size (lengths: 21, 33 and 7). Each vector contains ratio of bug-to-duplicate bugs in 3 different time periods. I have to find whether there is a difference between the 3 groups.
I cannot use one-way ANOVA since the groups have unequal sample sizes and unequal variances. I cannot use TukeyHSD because of unequal variances. Is Dunnett's modified Tukey Kramer test the only test available for such a kind of data? If, so how to interpret the results of that test since the Dunnett's test in R does not provide a p-value?
Is chi-squared test applicable to this data?