All Questions
8
questions
2
votes
1
answer
513
views
Wilcoxon signed-rank test with an additional covariate
Problem formulation
I have 5 strains on which I administered treatment and repeated the experiment two times independently. So my data looks something like this:
...
- 165
0
votes
0
answers
39
views
Appropriate test for two not-normally-distributed data samples
I have some data comparing training participants who experienced the same training course either face-to-face or virtually (via Zoom). I have two survey items I am comparing. Sample A is for virtual ...
6
votes
3
answers
351
views
T-tests provide info about the margin of mean difference?
I have 2 unpaired datasets where the difference of the sample means is quite substantial (with the naked eye). The t-test shows that the difference is significant (p-value=0.007) and I would like to ...
- 63
0
votes
1
answer
553
views
Significance test with non-normal, bounded data?
I am attempting to do a one-sample significance test to determine whether a set of data differs from a given value (0 in this case). The issues I have with these data:
Non-normally distributed data, ...
- 3
1
vote
2
answers
404
views
Appropriate statistical test for data which do not have normally distribution and do not have equal variance
My data has 150 samples and is not normally distributed, and it does not have equal variances either. I know t-test (e.g. this python method) can be used when data is normally distributed and it can ...
- 271
1
vote
2
answers
440
views
Non parametric one sample test on difference
I have a group which is not normally distributed. I need to check whether the difference between left and right hand within the group is significant. Initially, I calculated the absolute difference (I ...
- 13
2
votes
0
answers
455
views
Effectiveness of exam: did it achieve the goal?
I have a dataset of student scores in an exam. Its structure is as follows:
...
- 121
0
votes
1
answer
409
views
Which statistical test to use? Paired-sample or independent-sample?
I have 1 subject rating 40 participants on the big five personality traits and other variables. these 40 participants are in 2 conditions (20 each). I want to compare whether there is a difference ...
- 1