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Questions tagged [association-measure]

Measures of the association between variables, a more general concept than correlation

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27 views

If the datapoint furthest from the y‐axis was excluded, what would happen to the associations seen?

looking at the Figure below, what would happen to the association if the datapoint furtherst from the y-axis was excluded? Current linear association indicates: Diabetes prev = -0.0171183 x BT ...
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Why do signs of association change in multilevel logistic regression?

In given data, the outcome of interest is a binary variable (who participated in the program? yes/no). Additionally, individuals are nested within districts that create correlated binary data. I've ...
12 views

Measuring Similarity or Association between unpaired data of different sizes

Is there a way to measure the association or similarity between two variables that are not paired. For instance if I have 3 variables with sample sizes of $n_{1} = 10$, $n_{2} = 15$ and $n_{3} = 15$ ...
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For a meta-analysis study, is it correct to derive specific haplotypes from multiple studies that report varying number of SNPs at a gene locus?

My question is based on conducting a meta-analysis on the association of multiple variants in a single gene with a complex disorder using published case-control studies. For my study, around 5 well-...
20 views

Optimation Association Rule Using Genetic Algorithm

i have association rules that i got from FP-Growth algorithm and i want to optimize that association rules using Genetic Algorithm so i can get the strong rules. Does anyone know how to bring the ...
34 views

If I have less than 5 elements in a cell is there a way to use Chi Squared? [duplicate]

I have some data which has less than 5 elements in a cell, which would usually lead to fishers test being used instead. However, I'm unable to use fishers as there's not enough memory for it. chi ...
38 views

How to measure the association/correlation between two unordered category distributions

I have seen the questions like Correlations with unordered categorical variables , but I cannot implement the chi-square test since I don't have a chi-square table representing joint distribution. ...
29 views

Pointwise Mutual Information Word Dependency

I have pre-defined concepts which are either a single word or couple of words that refer to a concept.( In the context of machine learning for instance, covariance matrix is a concept). I am trying to ...
28 views

Independence and strength of association between categorical variables

I am pursuing my master's thesis in Global Health at Uppsala University. One step in my statistical analysis involves "consumption of ultra-processed food (UPF)" as the independent variable (having 3 ...
35 views

correlation between binary dependent variable and independent ones

I ran a logistic model to predict a YES/NO (equivalent to 0 or 1, that is a binary variable) through a stepwise selection (I have either categorical and numerical variables). I was then asked to ...
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Analyzing/modelling discrete numerical responses and determining associations based on categorical co-variates

I need and would be grateful for some advice regarding the analysis of some data that has been gathered and coded by a third party. The data is part of a project regarding performance in the health ...
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What test to use with many groups and interactions

I am trying to design an experiment with impact of many factors on one variable, the basic idea is to measure variable A when facing factor 1, factor 2, factor 3, etc. Secondly I would like to ...
245 views

How to test whether the association between two continuous variables varies by a third variable?

If I have two continuous variables, and want to check whether their association varies by a categorical variable (e.g. gender), is there a formal statistical test for this? I know I can create a ...
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Finding the “optimal” non linear relationship between two variables

I am looking for finding associations between a binary outcome regarding women fertility and several potential risk factors. Since this study is quite exploratory, I was planning to include all my ...
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Association rule lift ratio converging to 0.5, is it not independent?

As far as I know, lift is a measure used in association rules to see whether there is a positive association between two items(instances?) I've done a simple (possibly wrong) simulation with lift ...
280 views

How to compute p-value for Goodman and Kruskal's lambda and tau

How do I calculate p-values for Goodman and Kruskal's lambda and/or tau tests for association between categorical variables (measure improvement in predictability of the dependent variable given the ...
554 views

Association, relationship and correlation

Are measures of association, relationship and correlation the same? Different textbooks uses those words interchangeably and Im wondering if the they are the simply the same...
78 views

Calculation of relative performance gain

I want to measure the improvement of students using exam marks of semester 1 to semester 3. The following detail should be considered when calculating the measure; If Student A get 30 (sem 1) and 50 (...
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how to measure the correlation between non-normally distributed numeric variable and nominal variable?

I have two nominal variables and some numeric variables. The first nominal variable is a binary one. I want to measure the correlation between this binary variable and the other numeric variables. ...
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How can a variable have a positive association through logistic regression, yet a negative association through Cox regression?

I am undertaking some medical research using R. My outcome of interest is mortality in the intensive care unit. Data My data looks like this (there are ~15,000 rows). ...
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Association between proportions as predictors and normally distributed response

Assume I have the following data points: ...
304 views

Association rules between many continuous variables

I have a large dataset and I'm trying to mining association rules between the variables. My problem is that I have 160 variables among which I have to look for the association rules and also I have ...
110 views

Is there a Correlation metric for Categorical vs Numerical features? [duplicate]

I've been searching for some time for a correlation metric analogous to the Pearson correlation value for numerical vs numerical features, or Cramér's V for categorical vs categorical features, but ...
57 views

Statistical Significance Test (Genotypes and Race)

I've been trying to think of the best way to approach testing for associations of genotypes (i.e. D/D, D/I, I/I) with ethnicity (i.e. African Americans, etc). Specifically, I would like to test ...
2k views

Intuitive meaning behind support, confidence, lift and conviction

I'm learning about association rules and came across the common interestingness measures support, confidence, lift and conviction. I'm interested in the intuition behind your decision-making process ...
141 views

Boschloo's exact test

I have following data in R: d1 <- matrix(c(24,2,63,11),2,2, dimnames=list(X=c("present", "absent"),Y=c("present", "absent"))) I want to test ...