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0 votes
1 answer
584 views

What is exactly the non-normality requisite for nonparametric tests? [duplicate]

As the title says, what is exactly what is being tested before deciding to use a non-parametric alternative test (as Kruskal-Wallis for ANOVA, or Mann-Whitney's U for student's t)? Most sources are ...
Kuku's user avatar
  • 1,472
6 votes
2 answers
3k views

Wilcoxon Test - non normality, non equal variances, sample size not the same

I know there are already a lot of posts out there, but I couldn't find this exact combination in any of them. Comparing two samples (Prices associated with men and with women), but I have neither the ...
Heike's user avatar
  • 71
0 votes
0 answers
933 views

Normally distributed data but small sample size, use nonparametric test?

My data set is very small (n=16) which according to a Shapiro-wilk test is normally distributed (p=0.82), despite the histogram looking questionable. When I split the data into my two categories there ...
Katharine Davies's user avatar
0 votes
2 answers
2k views

Absolute values -- parametric or non-parametric test?

I am looking at the absolute difference in values between pairs of numbers. I am then comparing these absolute values between two groups (e.g. Males and Females). Since these are absolute values I ...
Lexi's user avatar
  • 1