All Questions
7
questions
1
vote
0
answers
46
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Paired t-test on large sample that *should* be normal, but isn't (or Wilcoxon Signed Rank Test)?
A dataset contains the number of fast food restaurants per thousand people for each county in the USA, for two different years (five years apart). 3,143 rows.
None of the following are normally ...
user252085
0
votes
1
answer
34
views
Using paired t-test or Sign test to compare two groups of correlated measures on the same subject?
I have conducted a survey where participants are shown 8 different advertisements: 4 of the ads attempt to evoke the feeling of guilt, 4 others attempt to evoke the feeling of shame. After seeing each ...
1
vote
0
answers
28
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Alternative test to paired t-test? [duplicate]
I need to compare data from paired groups, but my distributions are non-normal, and my sample size is small. Are there any tests I could apply?
I've been looking into non-parametric alternatives like ...
- 11
2
votes
1
answer
5k
views
Paired t-test of a non-normal data with sample size 66
I have a paired data with n=66. I understand that normality condition of differences data should be met to conduct a paired t-test. However, from the histogram, it doesn't appear so normal. The p-...
- 135
6
votes
1
answer
21k
views
Non-parametric version of paired t-test (Mann–Whitney U test)
I have data from 100 individuals doing a 2AFC under a control and a manipulated setting. I want to compare the means. I initially used a paired t-test. My supervisor noticed the distributions were not ...
- 582
1
vote
0
answers
312
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Non parametric anova or two non parametric ttest?
I have a statistical question about a project I recently got.
We performed a flow cytometry assay on 3 different groups: controls (n=5), patients before treatment (n=5) and paired patients after ...
- 501
6
votes
1
answer
19k
views
Are pairwise Wilcoxon tests a valid non-parametric alternative to Tukey's HSD test?
I am trying to identify significant differences between groups from normal and non-normal distributions. When the distribution is normal the workflow is pretty straightforward: ANOVA and after that a ...
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