All Questions
Tagged with faq normality-assumption
4 questions
52
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5
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Normality of dependent variable = normality of residuals?
This issue seems to rear its ugly head all the time, and I'm trying to decapitate it for my own understanding of statistics (and sanity!).
The assumptions of general linear models (t-test, ANOVA, ...
- 901
62
votes
3
answers
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ANOVA assumption normality/normal distribution of residuals
The Wikipedia page on ANOVA lists three assumptions, namely:
Independence of cases – this is an assumption of the model that simplifies the statistical analysis.
Normality – the distributions of the ...
- 3,758
158
votes
8
answers
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Pearson's or Spearman's correlation with non-normal data
I get this question frequently enough in my statistics consulting work that I thought I'd post it here. I have an answer, which is posted below, but I was keen to hear what others have to say.
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383
votes
15
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Is normality testing 'essentially useless'?
A former colleague once argued to me as follows:
We usually apply normality tests to the results of processes that,
under the null, generate random variables that are only
asymptotically or ...
- 15.1k