Hi, I am trying to determine whether the differences in means of several groups are statistically significant.
Initially I ran an ANOVA on Stata but then realised my data set was neither normally distributed and there was no homogeneity of variances between groups.
From reading online it seems that Welch's ANOVA is appropriate for data which lacks homogeneity of variances but is normally distributed whilst Kruskal Wallis is appropriate for data which is not normally distributed but has homogeneity of variances.
Are there any specific tests which would be valid for my data and if so, how would I perform these on Stata?
Many thanks,
Ciaran
Initially I ran an ANOVA on Stata but then realised my data set was neither normally distributed and there was no homogeneity of variances between groups.
From reading online it seems that Welch's ANOVA is appropriate for data which lacks homogeneity of variances but is normally distributed whilst Kruskal Wallis is appropriate for data which is not normally distributed but has homogeneity of variances.
Are there any specific tests which would be valid for my data and if so, how would I perform these on Stata?
Many thanks,
Ciaran
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