# Questions tagged [permutation]

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### Quantitative/statistical comparison of two orderings/permutations

There is a couple, say, Theresa and Robert. They assess their preferences on 5 books by ranking them from the most attractive to the least one. Theresa: [0,4,3,2,1]...
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24 views

### Monte carlo simulation [closed]

I am working with some data with sample size equal to 11, looking for differences between two locations; a and c. Due to the small sample size and the absence of normal distribution I have opted for ...
0answers
4 views

### When performing randomisation tests on my single-case design data, do I include all participants?

I have just completed a single-case, multiple baseline design study with 5 participants. I was planning to perform visual analysis and randomisation tests (RT). However, 2 participants have >50% ...
1answer
29 views

### Probability of n persons picking multiple numbers from N numbers, that all choices are different

Given $N$ distinct numbers, $n$ persons each picks $x_i > 0$ numbers, what is the probability $P$ of them all picking different numbers? The limiting case of $n > N$ is trivial, $P = 0$. Same ...
1answer
31 views

### Intuition behind permutations + probability

I'm new to stats so I'm struggling to grasp the intuition behind permutations + probability. Would anybody be able to help me with parts (b) and (c) of this question? Any help is greatly appreciated :)...
1answer
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### What does it mean to “permute” a predictor in the context of random forest?

I am reading the vignette for the R package randomForestExplainer. There the result accuracy_decrease (classification) is defined as mean decrease of prediction ...
1answer
37 views

### Permutations - counting [closed]

Four girls bought each a swimsuit , and they decided to share them . How many days are needed so that each girl will wear each swimsuit once ?
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### One sample data with unusual structure, permutation test?

I have N sets, each of them consisting of 1000 integer values. Typically, more than 90 % of values within a set is zero, thus median is zero. The nonzero elements are positive integers. We take N ...
1answer
44 views

### One sample permutation test on skewed data

I have one sample of values, each of them is a z-score from mutually independent z-scored distributions. I aimed at testing that the mean value of the sample is larger than zero. Originally I wanted ...
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10 views

### Distribution of a rate in a subsample after permutation of the total dataset

I need to estimate the distribution of a rate in a subsample after permutation of the total dataset. I was wondering whether it's sufficient to use the binomial distribution with the global rate ...
1answer
26 views

### Evaluate clustering accuracy based on an adjacency/similarity/connection matrix

Description In the classification tasks, the classification accuracy is computed by accuracy=n_correct/n_total For example, if I have three samples, and the ...
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22 views

### Interpretation of the adjusted rand-index

I'm trying to understand the adjusted Rand index for a metric review that I'm doing. I found this question most helpful so far: Calculating the adjusted rand index? https://en.wikipedia.org/wiki/...
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### All combinations for a King and Queen (coed) 2's Tournament Pool Sheet (N girls and N guys)

Ok so I have N girls and N guys. I need to create a 2's beach volleyball coed tournament (also known as King and Queen style). I want a list (like Joe and Jill versus Donald and Melania...etc.) of all ...
1answer
232 views

### Probabilities arising from permutations

Certain interesting probability functions can arise from permutations. For example, permutations that are sorted or permutations that form a cycle. Inspired by the so-called von Neumann schema given ...