# Questions tagged [spearman-rho]

Spearman's rank correlation coefficient, usually denoted as $\rho$, is a measure of concordance between two random variables.

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### Distribution of the Spearman rank correlation coefficient under the assumption of non-zero correlation

There are some papers and some R packages providing exact calculations for the CDF and the inverse-CDF of the (sample) Spearman rank correlation coefficient. My question is: How difficult would it be ...
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### Spearman Correlation for multiple variables

I want to characterize the correlation of a set of variables with a target variable using Spearman correlation since I expect the relationship to be monotonic but not necessarily linear. Specifically, ...
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### Correlations significant at individual level, but not at group level?

For my research I have to do correlation tests to see how different measures of animal welfare are related to each other. When i run the test using the data at individual level, it shows a weak ...
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### What is the best way to represent Spearman’s correlation graphically?

For my thesis research I have to do Spearman’s correlation tests on a set of ordinal variables. I would like to represent the correlations graphically to include them in the report and give a clearer ...
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### Spearman's Correlation and effect size

I have completed data collection and I have a Spearman's correlation of .64. My advisor is wanting me to report the effect size and from everything I have read and can find it appears that .64 would ...
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### Inference of nonparametric tests as linear models

I found some statements throughout the web that suggest that most common statistical tests can be performed as general(ized) linear models (cf. here). For a Wilcoxon test the author of the referenced ...
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### spearman correlation: should only the ranked values be plotted on a scatterplot?

My data is not normally distributed and so I did a spearman correlation rank test. I now need to make a scatterplot showing the spearman rank test results and I am not sure if the scatterplot should ...
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### Significance test for partial rank correlation

Given variables $X$ and $Y$, and control variables $Z_1,Z_2,\cdots Z_n$, I want to compute the partial rank correlation and its p-value. Preferably using Kendall's Tau (although I'm aware of 1). While ...
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### Spearman's Rho for Dependent Samples Measured at Time Windows

I have conducted a study where I have collected dependent data (not i.i.d) from 10 participants, measuring variables X and Y from the participants at various time-windows. Thus I have n=350, for ...
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### How to calculate the correlation by the Spearman method for each quantile of the quantile regression in R?

I'm trying to calculate the Spearman's correlation coefficient for each quantile of my quantile regression (to later calculate the R² of each quantile), but the package I know of (QCSIS) uses Pearson'...
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### Understanding low rho values and high p-values from Spearman's rank test

I am looking for help regarding Spearman's Rank test results. I am trying to identify the correlation between 4 variables: age, gender, area (rural or urban) and education level. However, my results ...
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### How to use the Spearman's rank correlation in R

I used three methods (M1, M2 and M3) to generate rankings, which is the result database. ...
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### Why Spearman's rank correlation ranges from from -1 to 1

$$\rho = 1 - \frac{6 \sum d_i^2}{n(n^2 - 1)}$$ $\rho$ = Spearman's rank correlation coefficient $d_i$ = difference between the two ranks of each observation $n$ = number of observations Given the ...
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### Self-contradictory asumption of normality? Nonparametric point-biseral correltion coeffiicent? t-test or Mann-Whitney U?

A. I know from the net that for a design with one binary variable and a second variable that is continuous but is NOT normally distributed, I can use BOTH the point-biserial correlation (which is ...
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