All Questions
Tagged with nonparametric statistical-significance
52
questions with no upvoted or accepted answers
4
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0
answers
213
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Nonparametric test for largely skewed count data
My research design looks as follows: an experimental game with 4 participants (human subjects), repeated for 20 rounds. During each round, participants are allowed to form bilateral coalitions which ...
- 53
4
votes
1
answer
2k
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Friedman's test to identify best of multiple classifiers on multiple domains
I have several classifiers $f_i\ (i=1, \cdots, N)$ and calculated performance measures on multiple domains $(D)$ for each. Thus, there are $N \times D$ values.
I want to find out (increasing ...
- 599
3
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208
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Parameter estimation when the likelihood function does not exist
The observations $Z_1,Z_2\cdots$ are i.i.d. We have
$$Z_k = \sum_{i=1}^\infty \frac{X_{ki}}{2^k}.$$
where the $X_{ki}$'s are i.i.d. with a Bernouilli$(p)$ distribution. If $p=\frac{1}{2}$ then $Z_k$ ...
3
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446
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Multiple comparisons between two groups (non-parametric)
Update Added more details about the Experimental setup.
My experiment comprised two groups, control (N=25) and experimental (N=26). Each participant belonged to one group. Their performance has been ...
- 123
3
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56
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Statistical test for first sample greater than given sample?
Does anyone know of a name for the following statistical test/whether there is a name/whether the following line of reasoning is just bogus?
Say I have a value $x$, and a way to generate samples from ...
- 31
3
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0
answers
542
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p-values for permutation tests
Let's say I want to test whether the average performance of two individuals who work together (let's say in the same room) is different to their performance when they would not have worked together.
...
- 107
2
votes
1
answer
80
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What non-parametric test for multivariate binary data should I use?
I have two different groups of participants ("g" and "b") answering the same set of questions. Group "g" answered questions in the same order. Group "b" ...
- 21
2
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Is there a statistical test for five groups with averages ONLY?
The data I collected was measuring plant shoot masses and these were extremely small, so I could only find the total mass of the shoots from 30 plants. Hence, I only have the mean and none of the ...
user387381
2
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0
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69
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When is the central limit theorem not applied?
I am trying to compare two matched samples. In total I have a sample of 34 people. Each patient receives two treatments, a C1 treatment and a C2 treatment. So each patient will be compared to himself ...
- 919
2
votes
0
answers
30
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Testing tuples of response variables
I'm struggling with comparing samples with multiple response variables, where such variables have a strict precedence or importance order. For the sake of this exercise, let's assume that each sample ...
- 121
2
votes
0
answers
455
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Effectiveness of exam: did it achieve the goal?
I have a dataset of student scores in an exam. Its structure is as follows:
...
- 121
2
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49
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What to display for differences of medians of discrete variables?
I am using the Mann-Withney U test to compare two samples of count data. In several situations, I find that there is a significant difference between the populations, but when I estimate the CI for ...
- 407
1
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0
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57
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Welch ANOVA for Comparisons of Elevation & altered Sediment Accretion of Sea Ecosystems: Large DEM with no normal distribution & heterogeneity
I am investigating the elevation characteristics and sediment accretion effects of two distinct ecosystems within the Wadden Sea, impacted by the bioinvasion of one species (ecosystem one) and ...
- 11
1
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48
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Doubt on non-parametric ANCOVA with two groups and pre-post scores and pre scores (baseline) as covariate
I have used a non parametric ANCOVA to analyze scores of a questionnaire (BSCS) with factors: Type of intervention(A and B) and timepoint (pre- and post) as well as baseline (same distribution as pre-)...
- 121
1
vote
1
answer
172
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Interpretation of interaction coefficients and p-values with categorical predictors
Let's say that we have gene expression measurements from bacteria after heatshock. The expression changes are collected as log2 changes, and are approximately normal and centered around 0. Ribosomal ...
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