Questions tagged [ties]
Ties refer to equal values observed in the data. When multiple, ties can pose a problem for some methods of data analysis.
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Wilcoxon Signed rank test for heavily tied paired data
We conducted an experiment to test the effect of a map annotated with the height of landscape features on participant's estimates of height relative to that recorded by a UAV. We asked them to record ...
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How to simulate data with ties in R
I am using R to investigate the effect of tied values on rank-based correlation statistics
I wish to simulate correlated bivariate standard normal data with some specified proportion of tied values (...
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Chance of a tie for most goals in a set of 4 football matches
My statistics knowledge is basic at best but here goes:
4 football/soccer matches with expected goals of 2.6, 2.75, 2.4, 2.85
I'm interested in working out the probability of at least 2 of those games ...
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How to handle ties in pairwise wilcoxon rank-sum test?
I am willing run the wilcoxon rank sum test for different combination of variables, and using the base R code, I get a lot of warnings. The reason is that there are so many (about 30% of the whole ...
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What methods can be used to overcome the tie-breaking when using majority voting in ensemble?
What methods can be used to overcome the tie-breaking when using majority voting in ensemble? I read that Weighted majority voting can help; however, it wasn't effective on the dataset I am using in ...
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Use of Mann-Whitney w/ Ties
I am tracking the results of a test between a control group and 1 variant group. Each group contains (an unequal quantity of) users whose order count we're now tracking. The histogram is heavily ...
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What happen if KNN has k=1 and there are 2 nearest classes with the same distance
What happen if KNN has k=1 and there are 2 nearest classes with the same distance?
as fare as I know, If k is even number and have equal classes number it will random class for the answer.
But what ...
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ties in Wilcoxon t test in R
I have a paired data with a small sample size of 19 subjects who gave different scores at time 1 ($T_1$) and time 2 ($T_2$). I'd like to conduct a Wilcoxon test using R, because my data are not normal....
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Math behind Kendall tau-b
I was looking up the definition of Kendall's tau-b and noticed that there seems to be two distinct equations floating around:
Equation 1 (Wikipedia):
$ \tau_b = \dfrac{n_c - n_d}{\sqrt{ (n_0 - \sum ...
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Cox Model - Are Censored Observations in the Risk Set?
I'm running a cox proportional hazards model. I'm somewhat new to the area and have a question about the definition of the risk set and the use of it in computing partial likelihoods.
Specifically, ...
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How does one apply hierarchical agglomerative clustering when multiple positions are equidistant (non-unique distance matrix)?
I have been following this single/minimum -linkage example to better understand hierarchical agglomerative clustering. I noticed that the entries of d_ij are unique ...
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How does Normal approximation work when ties exist for Wilcoxon Signed rank test?
I ran wilcox.test() in R (outcome variable was a test score and the data was paired samples) and got a warning message saying that it cannot generate a p-value for tied values. I saw the R document ...
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Ties in a two-sample Kolmgorov-Smirnov test
This question is somehow connected to this one.
I am performing a two-sample KS test in R and I think I have not fully understood the issue of the ties.
Reading the help: ...
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Is a kernel density estimate meaningful if > 25% of my data are duplicates?
The title pretty much says it all. I have data that consists of 80 samples but there are always at least four samples that have exactly the same value. I want to assess, whether the data is unimodal. ...
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Distribution that minimises ties
Here's a result I'm trying to get as part of a larger problem I'm solving: The random variables $A_1,B_1...J_1$ and $A_2,B_2,...J_2$ can take integer values between 0 and 100 such that $A_1+...+J_1=...
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