Category Archives: ANOVA

7a. Assumptions of Statistical Tests: Ordinal Data

In my ‘7. Assumptions of Statistical Tests‘, there was a glaring omission (at least glaring for me): no discussion of ordinal data.  I felt that I let my readers down, by glossing over this issue.  Time to repair my quite … Continue reading

Posted in ANOVA, assumptions, Biostatistics, non-normality, non-parametric statistics, Ordinal, Statistics | 2 Comments

15. Variance, and t-tests, and ANOVA, oh my!

Statistics – a specialty of mathematics whose basic tenant is ‘Exceptions prove the rule’. Mr. McGuire: I just want to say one word to you. Just one word. Benjamin: Yes, sir. Mr. McGuire: Are you listening? Benjamin: Yes, I am. … Continue reading

Posted in ANOVA, p-values, t-test, Uncategorized, Variance | Leave a comment

16. Comparing many means – Analysis of VARIANCE?

What do you call a numbers cruncher who is creative?  An accountant. What do you call a numbers cruncher who is uncreative?  A statistician. *** In the last blog, I explored the meaning of variance.  I said that variance is … Continue reading

Posted in ANOVA, Treatment Effect, Variance | Leave a comment

19. A Reconsideration of My Biases

No virtual observations were harmed in the running of this study. A man with one watch knows what time it is.  A man with two is not sure, at least for the Wilcoxon test. And don’t try this at home, … Continue reading

Posted in ANOVA, Effect Size, non-normality, non-parametric statistics, p-values, Power, t-test | 2 Comments