All Questions
7
questions
0
votes
0
answers
81
views
Nonparametric hypothesis test for ratio of medians
I have 4 distributions:
A1, A2, B1, and B2.
I would like to test whether there is a significant difference between median(A1)/median(A2) and median(B1)/median(B2). While I can calculate propagated ...
- 1
7
votes
1
answer
584
views
When to test For Equality of Medians, and when Stochastic Equality?
In statistics, we are very often interested in investigating whether some score (let's say life satisfaction) tends to be bigger in one population (let's say rich people) compared to another ...
- 1,980
5
votes
2
answers
178
views
Wilcoxon (WMWU) test sensitivity
Statistics courses often give the Wilcoxon-Mann-Whitney U test ("Wilcoxon" from now on) as an alternative to the two-sample t-test.
However, the test is not quite the test of medians that would be so ...
- 65.1k
1
vote
0
answers
871
views
How to explain to a non-statistician researcher why the 2-sample Hodges-Lehmann-estimator is reported instead of the difference in median?
I need to explain the result of the wilcox.test in R. Many people believe it's about medians. Of course it is not. I understand this is a useful non-parametric measure about statistical equality of ...
- 11
2
votes
0
answers
48
views
Kruskal-Wallis Test: Identically Shaped Distributions
I'm currently working with the Kruskall-Wallis test and had a question about what people mean when they speak about 'Identically Shaped Distributions' and how I could identify whether my data fits ...
- 83
4
votes
1
answer
225
views
Testing median of a sample using randomisation methods
I am given a sample of data for which I need to test the hypothesis:
$H_0: m=m_0$ vs. $H_1: m \neq m_0$
where $m$ is the population median and $m_0$ is the hypothesized median.
The question asks to ...
- 1,779
6
votes
4
answers
2k
views
Is there an unpaired version of the sign test?
I wasn't able to find one on Google, and was wondering if one exists...
- 21.8k