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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Explanation of Spearman values
please check if I understood correctly.
(for your information 1- youngest, 7-oldest)
Spearman's rho informs that the correlation is negative, which means the older the age group the less points it ...
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How to put a collection of random variables in order?
I have a collection of independent Gaussian random variables with unknown means and variances. I want to order them in the order of increasing mean value. For this, I want to come up with a score ...
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Sign of Covariance and of Spearman's Rho
Has anybody available a proof that the covariance between two variables has always the same sign as Spearman's Rho, assuming that both are not zero, or an explanation / counterexample to show why this ...
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1answer
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Interpreting the relation between p-value and rho value
I am applying Spearman correlation test on two different variables. I'm getting results of p-value and rho as follows:
...
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Multiple testing for correlations on small number of samples - try PCA first?
I am looking for relationships between mass-spectrometry results (566 intensities of peaks common to all samples) and sample metadata (24 variables with various chemical information). There are only ...
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1answer
54 views
Identify dependent or independent blocks of time series (clusters)
maybe I am lost in translation but I need your help.
Description: Having long time series of two variables I create some blocks (or clusters) with the method of peak over threshold but I need to ...
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R - checking colinearity of 3 categorial and 1 continuous variables
I have the following variables which are expected to influence the dependent variable kg waste:
turnover (continuous),
restaurant type (either D or I),
operation (either P or N),
owner (either M or F)...
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1answer
21 views
Can I use Spearman's rho?
I'm taking a research class for Social Work and this is not my strong suit, so please be kind. :) The system that I have to do my statistical testing includes only the following tests: (ANOVA, Chi ...
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Comparing a predicted order of events to actual order of events
Sorry about my somewhat limited knowledge of statistics, it's just this is a tad too complex for my knowledge of the subject.
I'm running a competition where entrants are told what events happen, and ...
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How do I choose between Kendall's tau and Spearman's rho correlations? [duplicate]
I am trying to choose between the two correlation tests. I am trying to see if a trait is correlated with the area of a habitat patch for a number of different habitat types. The data is non-...
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1answer
40 views
Rho Spearman correlation test interpretation for sample equal to population
I have done a pair of cuestionaries to measure a pair of variables in a small population, 87 people, so I have taken the whole population as a sample, the cuestionaries have likert scales as answers (...
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Correlation between two items with different scales
I want to examine a correlation between empathy of bystander and acting to help the victim. I have a question How do you feel and think when you witness violence: 1) he deserves it, 2) I don't feel ...
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1answer
112 views
Pearson vs. Spearman
I am correlating two small sets of values – 28 items each. The data are normally distributed and Pearson‘s test shows a weak, non-significant correlation. On the other hand, Spearman’s test shows a ...
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Use samples from each individual or pool samples from several individuals.
I have a system that can predict that can predict the blood pressure for hospitalized patients from zero to 120 minutes into the future. Now I want to see if my predictions are statistically ...
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How to correlate movie taste?
I am looking for the best known way to correlate movie taste, i.e. to determine which people out of a large pool deviate the least from your own movie scores.
One site with this purpose is Criticker. ...
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1answer
35 views
Comparison Pearson Spearman
I have a weird question I couldn't find the answer on the Internet.
Lets consider a data set for which the points describe a function with some noise around it. Assuming that the function in question ...
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How to prove variance of Spearman's Rho
How does one derive the variance of Spearman's Rho?
The result is $\frac{1}{n-1}$.
I simplified the formula into the last line shown in the picture but how does one proceed from then? ($R(X_i)$ and $R(...
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1answer
411 views
Power calculation for Spearman correlation
Suppose, I am generating data from bivariate normal distribution with means 0 and variances 1 and correlation coefficient 0,0.5 and 1. I need to calculate power for different correlations.
I am doing ...
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1answer
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Correlation, Scatter graph [closed]
I have river flow rates for two separate rivers
The data produced this scatter graph for both rivers
https://i.imgur.com/jVnWF3t.png
What is the best type of correlation to use here?
Spearman, ...
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Sperman or Pearson?
I have 66 samples with assigned microbiome. I also have glucose measure for each sample. Which test should I use to see correlation?
To be more specific, I would like to use program: http://qiime....
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1answer
123 views
Which type of correlation should I use here? [closed]
For this data, I am looking at the relationship between bee population (1000s of bees) and area of genetically modified crops (km2).
I have generated a scatter graph using this data:
Question:
What ...
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2answers
682 views
Is Spearman correlation never greater than Pearson correlation?
If Spearman correlation is Pearson correlation, but on ranks of the data - does it mean that absolute Spearman will always be lower or equal to absolute Pearson correlation, but never greater? Is it ...
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2answers
549 views
Correlation between a continous and integer variable
I would like to calculate the correlation between two variables. The first variable is continous and represents a performance measure. The second variable is an integer in the range from one to nine ...
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Correlation test on the predicted variables
I want to ask is this make sense to perform spearman correlation or Kadaull tau test on the predicted data from linear model?
In detail:
I have my predefined ordered four groups, and these are not ...
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1answer
87 views
How to get cross-validated correlation estimate?
I have a logistic regression model trained on an outcome variable $y$ and I want to get an estimate of how good the predicted raw probabilities are in terms of aligning with $y$. I realize that ...
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can you transform spearmans r into pearsons r for meta analysis
my meta analysis involves the calculation of overall effect size based on pearsons r correlations within studies. I am already converting the pearsons r to fishers z scores for analysis but I have a ...
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monotonic relation and Spearman
Hello ,if I have data for 12 countries (N=12) and the data is ordinal, and want to study the correlations between the final score , resources and institutions variables of these countries by ...
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1answer
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Correlate nominal/metric data with ordinal data?
I am currently finishing my bachelors thesis and have a couple of questions regarding correlation in spss.
I have a questionnaire that generates metric data, nominal data and ordinal data.
I used ...
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66 views
mixing non-parametric correlation and parametric regression
I'm running both correlational and regression analyses on a variable that is not normally distributed:
For correlations, I decided to use Spearman's rank correlation (which is non-parametric) due to ...
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1answer
248 views
Theoretical computation Kendall's tau [closed]
While working with rank correlation statistics of samples, specifically Spearman's rho and Kendall's tau, I came across the interesting theoretical interpretation of Kendall's tau. It can be viewed as ...
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28 views
Does sample size needs to be consider in the correlation between a proportion and a ranked variable?
I'm looking for the correlation between a rank variable A and the proportion of blue (variable B) among 3 types of colour: blue, ...
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1answer
28 views
Two Variables: CPTED Audit Rating and Crime Count-Which test to use?
My project is focused on Crime Prevention Through Environmental Design, AKA CPTED. CPTED is a theory that certain characteristics of the built environment, such as level of maintenance, level of ...
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1answer
199 views
Spearman's rank correlation coefficient
When trying to learn about the differences between Spearman and Pearson correlation coefficients, I was pointed towards this paper:
http://geoinfo.amu.edu.pl/qg/archives/2011/QG302_087-093.pdf
But ...
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Difference between cross-correlation and Pearson / Spearman
I'm trying to find the best way to look for common trends in 10 time-series that I have.
I'm confused by what I'm reading regarding the best way to go about this.
I see people talking about the ...
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1answer
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Rank correlation not equal correlation on ranks in cor()
Why am I getting different results for Pearson and Spearman correlation, although I am already comparing ranks?
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1answer
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Correlation attenuation: Question about Spearman’s correction
Correlation attenuation: Question about Spearman’s correction
Disclaimer: I’m not a statistician, so please don’t be surprised about ignorance and/or outrageously stupid faults in reasoning. But do ...
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2answers
290 views
Derive Spearman correlation (rather than Pearson's) coefficient from a univariate regression?
In univariate regression, the standardized coefficient is equal to the Pearson correlation coefficient. When the two variables are ranked variables,
Spearman correlation would be appropriate. Is it ...
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1answer
512 views
How can I interpret a moderately negative correlation?
I've conducted a Spearman's rank-order correlation test on a set of data. The Score which a participant got on a test is the independent variable, and their Responses to a Likert-type question are the ...
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1answer
57 views
Strange test of correlation!
I had a strange correlation test result between two variables ($y$ = residuals of a linear regression, $x$ = dependent variable).
In RStudio, cor(y0,x0), which ...
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Consider an ordinal variable as continuos for correlation with a continous variable
I need to analyse the results of a survey. Among the different questions I have: "How happy did you feel last month"?. There are 5 possible answers:
Not at all
Not very
Somewhat
Very
Completely
Now,...
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1answer
158 views
Difference between Theil-Sen Estimator and Spearman Correlation
Hi guys I have a very strange result
My Spearman correlation says there is no correlation between temperature and number of users (alpha 5%). Data is autocorrelated, non normal, heteroskedastic. That ...
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Spearman-like correlation when X and Y are interchangeable?
I have some data consisting of pairs of brothers, and I want to look at correlation within the pairs. There is no logical basis for determining which one will be "X" and which one will be "Y".
So, ...
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135 views
Jensen-Shannon divergence for binary variables?
I am building a regression model and I am trying to test whether my variables are correlated before using them in my model. However, I have some variables that are binary, i.e., they can assume the ...
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2answers
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How to know whether Pearson's or Spearman's correlation is better to use?
I have this question that is really confusing. I already know that Pearson is used for normal distribution and Spearman for the opposite, but how do we apply this to the question? As you can see, ...
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(Non-)linearity and correlation (Pearson v. Spearman and Kendall)
I am a bit confused about how to interpret correlation coefficient results. I am aware that there are numerous questions about the differences between Pearson, Spearman, and Kendall, but I am more ...
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1answer
236 views
Higher Spearman but lower Pearson correlation?
I recently engineered a replacement for one of the most important features in my production model. This replacement makes more intuitive sense than the current version of the feature, and I was ...
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Appropriate statistical test other than Spearman Rho
I want to determine the interaction between job performance, job satisfaction and employee personality, is there a more appropriate statistical tool for this problem other than Spearman Rho ??
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1answer
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Correlation metric for 0-1 vector and real values vector [duplicate]
I am looking for a right correlation metric to measure correlation between two vectors. The dimensionality of the vectors is around 100. The first vector has real values as the elements and the second ...
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0answers
172 views
Measure of relationship between two variables that are percentages containing many zeros
I am working with various different data sets (in the context of forest reclamation on industrial disturbed landscapes) that contain percent cover values of desired (planted) and undesired plant ...
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How to choose a correlation measure when Pearson is close to 1 and Spearman close to -1?
I have two large datasets from nonlinear control systems. I am trying to correlate the error with the control action taken.
If the error is plotted as fx and the control action as fy we end up with ...
