# Questions tagged [permutation]

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### Question on permutation and combination

I am having a trouble understanding how to answer the following question and what method to use. The final answer is $415800$ Suppose there are 4 committees A, B, C, and D. 11 candidates are randomly ...
15 views

### General interpretations of permutation null distributions under the alternative

I've come across some papers employing z-scores of permutation null distributions as a primary metric in neuroscience (for an example, see here). The authors computed a coefficient of interest in a ...
1 vote
18 views

### How to evaluate whether a treatment effect is significant given variance in measurement

I have two samples I am using to evaluate the effect of a treatment. Group $T$ contains 60 treated objects and their scores and group $C$ contains 60 control objects and their scores. The two groups ...
1 vote
63 views

### Making sense of the performance measures offered in Ranger

I have trained a regression forest using the R package ranger. Now I would like to discuss the variable importance measures of the included features. However, I am having difficulties understanding ...
14 views

### Number of possible permutations for N groups from I items where each item is of a different size but group total is fixed across groups

this is my first post. I am not sure how to approach this problem, I would like direction or even an algebraic solution please. I have to sort 70 different sized items out into 12 groups. Each group ...
1 vote
97 views

### Is this a valid statement according to the de Finetti theorem?

Some background on my problem - Let us consider a discrete memoryless channel (DMC) $W_{Y|X}$ from Alice to Bob. A DMC is a conditional probability distribution over the random variable $Y$ given ...
1 vote
44 views

### Bootstrapping or permuting as resampling methods for correlations?

I have many variables ( ~2000 and 320 samples) and I have found the correlation coefficient for each unqiue pair of these variables through Spearmann (underlying data does not have normal distribution)...
28 views

### Clarification of one sided vs two sided p value following permutation testing

I am unsure as to how to compute a two sided p value following permutation testing, following different examples online. For example, this post Two-sided permutation test vs. two one-sided, gets the ...
1 vote
120 views

### What's the difference between a Permutation and a Perturbation?

I frequently come across the terms Permutation and Perturbation within the field of explainable AI. I understand that both terms refer to methods that make changes to a sample's features. However, I'm ...
38 views

### Number of ways you sit next to your friend with 4 other people at a round table [closed]

This is a question I have after seeing Q1 of this question. There are a total of 6 people including you and your friend, and you guys are about to sit at a round table. The method of counting the ...
1 vote
34 views