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Questions tagged [cramers-v]

Cramér's V is a measure of association between two categorical variables.

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42 views

RxC Contingency Table to 2x2 Tables for local correlation analysis

I am trying to find if there is a correlation between the two categorical variables (Var1 and Var2). For that I am performing Cramer's V test on the RxC contingency table since the test that gives the ...
47 views

Creation of contigency table and calculation of effect size (Chi2, Cramer's V)

I am a bit unsure in my approach of applying the Chi2 GOF test to my data and calculating the correct effect size. The situation: I am studying the occurrence of specific biological phenomena in ...
13 views

Possible to use Cramer's V for two categorical variables with multiple trials from same individual

I am an undergraduate working on analyzing some data. My data is categorical and each individual has about 10 trials in which they selected an option 1-5 based on preference. Each option is made up of ...
46 views

Is it ever okay to ignore a low Cramer's V value?

I conducted a survey on college students to assess what demographic variables affected their views of and knowledge towards climate change. There are 11 variables total: Gender Religion Political ...
34 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 ...
170 views

Appropriate strength test of the chi-square test for large and unbalanced data

I understand different statistical tools have their own pros and cons. I'm trying to find the most appropriate one for my situation. I have a large, unbalanced data set and want to implement the chi-...
496 views

Can Cramér's V be used an effect size measure for McNemar's test?

I'm using McNemar's exact test (with R's "mcnemar.exact" function). I know that giving the odds ratio or proportion would be an adequate measure of effect size (Effect size of McNemar's Test), but ...
103 views

Cramers v when r = 1 and k = 2

I have just read that 'Cramér's V may also be applied to goodness of fit chi-squared models when there is a 1×k table (e.g.: r=1)'. It then goes on to say 'In this case k is taken as the number of ...
5k views

Chi squared test result and Cramer's V value

I have one dataset which contain many categorical variables. The target variable is also categorical. I tried to find correlation between each categorical variable with target variable, using chi ...
234 views

One sample chi-square

I have analysed very data set using an online calculator. I used a chi-square comparing the differences between 'strongly agree/agree' versus 'strongly disagree/disagree' to specific ...
3k views

interpreting Cramer's V results

I want to measure the magnitude and direction of a relation between two nominal variables: profession and hood. I choose to use Cramer's V based on this explanation. ...
199 views

What are the thresholds for strength of association?

As I was studying Cramers-V I saw two different Youtube videos authoritatively hand down 2 different sets of thresholds for strengths of measures of association. The first video said that 0-.29 was ...
158 views

Huge Chi-Squared Chi2 Test for Independence Statistics; is this methodology correct?

Beginner association question here. I have a dataset (~2.5M rows) with the following data: ...
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 ...
599 views

Is there an alternative to Cramer's V for computing effect size when chi-squared is inappropriate

I have a dataset within which I have a particular response variable that I'm interested in and numerous predictor variables. All variables are nominal and have as many as 15 possible values. When I ...
1k views

How to apply Cramérs $V$ on a 2$\times$2 matrix

I want to find the association between variables and Cramérs V works like a treat for matrices of sizes greater than 2$\times$2. However, for matrices with low frequencies, it does not work well. For ...
198 views

Regarding the interpretation of Cramers'V and Phi

How should I interpret Cramer's V when I have more than two variables in cross-tabulation table? Does the order of variables matter? E.G Gender , Age , Job , Income level Is Cramer's V the ...
460 views

association measure and statistical test for binary and ordinal variables in large datasets

Which statistical test and measure of association should I use in the following situation? I have a rather large dataset (>30 million obs.). I have a binary variable, and a bunch of other variables (...
109 views

How do analyse if a difference between two scores of Cramer's V is significant?

Previous research shows that there is a correlation between two variables. I am researching whether this is true in different groups. It seems like there is: Group 1: X2 (2) = 44.822, p < .001, ...
85 views

Comparing and ranking differentiating attributes across groups

I'm looking for some help on how to approach this problem. Say I have two or more groups of people. Each group has characteristics and attributes. For example, say we have the following two groups: ...
3k views

Effect size for goodness of fit chi-square

I would like to assess the effect size of a goodness of fit chi-square test. I have a variable that can have 3 states and test against a custom expected value. I used a variation Cramér's V for a ...
157 views

What are the different ways to discretize continuous features?

I'm working on classification problem. I have a set of continuous & discrete features and I'm trying to list my features in their order of significance. Using chi-squared test as a filter & ...
280 views

Cramer's $\phi$ for three-way contingency tables

Can Cramer's $\phi$ be determined for three-way contingency tables? I know how to calculate the expected values, chi squared, and how Cramer's $\phi$ works with two-way contingency tables. However, ...
2k views

$\chi^2$ of multidimensional data

I want to test if two observations of nominal data accord to the same distribution. I am using the chi squared statistics to perform a chi squared homogeneity test and normalize the result with Cramer'...
245 views

How is p-value performing as a measure of association?

It's known that Cramér's V (Chisq adjusted for table dimension and sample size) is a good measure of strength association. But what about the p-value? P-value (as a probability of the numbers we have ...
73 views

Determining $\chi^2$ for Cramer's $\phi$

I intend to determine Cramer's $\phi$ for two contingency tables of the following form: ...
526 views

What is the best visualization for Cramér's V?

When visualizing a linear correlation between two continuous variables, one uses a scatter plot, usually in combination with the Pearson product-moment correlation coefficient. When doing the same for ...
2k views

How do I convert Cramer's V to Cohen's d?

Say I have a chi-squared test that compares 3 different groups: $\chi^2_2 = 9.81$, $p=.012$, Cramer's $V=.33$ How would I go about converting this to a $d$-statistic? Is the proper approach in ...
5k views

Is it possible for Cramer's V to be negative?

To my understanding, Cramer's V cannot be negative because of the way we define it. But here's what I got from SAS:
84 views

Cramér's $V$ for one variable

In Wikipedia's summary on Cramér's $V$, it is mentioned that it can (also) be used in the one-dimensional case as measure of concentration. What is the formula in this special case? Is there any ...
502 views

How to convert Spearman's $\rho$, and Cramér's V to Cohen's $d$?

Is there a way to convert both, Spearman's $\rho$, and Cramér's V into the same effect size (f.e. Cohen's $d$), in order to have an information about which of the underlying relationships (nominal&...
Can the formula developed by Olkin und Siotani (1964) also be used to compare correlations from Spearman's $\rho$ and Cramér's $V$
The followgin formula is normally used for comparing two Pearsons $r$ correlations: Can this formula also be used to compare correlations from Spearman's $\rho$ and Cramér's $V$?
How to interpret Pearson's $r$, Spearman's $\rho$, Cramér's $\phi_{c}$ and Cramér's $V$ correctly?
Is it right that both Cramér's $\phi_{c}$ (and consequently Cramér's $V$ as well) are similar to the Pearson correlation coefficient, $r$, (and so, to Spearman's $\rho$) in its interpretation, as it ...