All Questions
5
questions
1
vote
0
answers
134
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Tests for positively skewed data with large enough samples?
I'm new to statistic tests so I need a little bit of help with them. Most of my data has distribution similar to the histogram below.
As it can be seen from the histogram, the data is positively ...
1
vote
0
answers
287
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Testing for normality with small sample sizes in order to use t-test [duplicate]
I run into a conundrum when determining whether a small sample is appropriate for a t-test. I know that if I meet the assumptions, a t-test produces approximately correct inference with any sample ...
- 497
2
votes
1
answer
2k
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Which statistical analysis should I perform if the data sets are not normally distributed?
I am doing an experiment where there are two independent groups; one is the group of "infected" patients another is the group of "sepsis" patients. I am comparing "platelet monocyte aggregates(PMA)" ...
3
votes
2
answers
2k
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Mann-Whitney for non-normal distributions with n>20?
I have 12 groups of datasets (mostly non-Normal, quite right-skewed), and I would like to see if there is a significant difference within each pair. (But the data itself is not a paired dataset, as in ...
- 33
8
votes
3
answers
46k
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What is a minimum sample size for a paired t-test and what is a non-parametric equivalent if data is non-normal?
I have 4 sample pairs, let's say (x1, y1),...,(x4, y4).
What is the minimum sample size for a paired t-test?
Which assumption should I check for paired t-test?
If my data is non-normal, what is an ...
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