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    Tukey-like pairwise comparisons of variances

    OBH and Katxt -- Thanks for continuing the conversation. I don't have your level of statistics expertise, so I must confess that I don't entirely understand the exchange. Do you think you've reached agreement on OBH's method? OBH -- did I summarize it correctly in my previous post (copied...
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    Tukey-like pairwise comparisons of variances

    OBH and Katxt -- Thanks so much for these extremely informative and helpful responses. I'm replying to OBH's above message because I understand it to be a summary of the approach I should use to test both hypotheses. The process for testing the first hypothesis (comparison of the means) is now...
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    Tukey-like pairwise comparisons of variances

    Sorry -- It might be more correct to describe the first test as Tukey, and the second test as a Levene's test with the median selected as the center. The difference is unclear to me, because the calculator for Levene's test produces pairwise comparisons labeled "Tukey HSD / Tukey Kramer"...
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    Tukey-like pairwise comparisons of variances

    Great, thanks so much for clarifying. When I perform separate Tukey tests for the group means vs. medians, they indeed produce very different p-values across pairs. To be clear, my study has two hypotheses: The first focuses on differences among group means, while the second ― which is the focus...
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    Tukey-like pairwise comparisons of variances

    Thanks!! I'll give this a try and follow up in the thread. Can you clarify what you mean when you say that the test "doesn't compare the variance defined but measured similar measurement"? I assume you're referring to this explanation from the website: "Target: To check if the difference between...
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    Tukey-like pairwise comparisons of variances

    Thanks for the reply. I think that's a safe assumption. Assuming it is, which test would you recommend?
  7. Z

    Tukey-like pairwise comparisons of variances

    Hi all, I’m testing a hypothesis that requires Tukey-like comparisons of the variances (or standard deviations) of multiple groups. I’ve already used Tukey to conduct pairwise comparisons of the means for these groups, but I’m looking for a similar test that would compare their internal...