Questions tagged [association-measure]
Measures of the association between variables, a more general concept than correlation
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Correlations can be compared with the Comparing Correlations ('cocor') package or R - but what if one of the variables is ordinal?
Let's say I want to compare the correlation of BMI and blood pressure in two independent groups and see, whether there is a difference between the correlations (whether the correlation is stronger in ...
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"The associations between x and y " vs "The associations of x with y" [migrated]
When conducting and reporting a statistical analysis, is it more correct to state:
"The associations between x and y "
"The associations of x with y"?
Or are both equally correct?...
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Comparing the percentage changes of two Crosstabs (Chi-square test of independence/association)
I'm looking for an association between 2 variables before and after manipulation. I ran 2 separate crosstabs and I'm able to see for which cells there's an association. Additionally, I want to see ...
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Method for determining which of two related continous variables has a stronger association with a third continous variable
I have two continuous variables and would like to determine which of these is more strongly associated with a third continuous variable.
I realize I could perhaps do a multiple regression and see if ...
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Inclusion of interaction term and interpretation
I'm planning to run a large amount of regressions to test for an association between medical conditions. As my dependent variable is always age-dependent, I include age as a covariate. For example, I ...
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How to analyse and compare a correlation between two variables over time between two groups?
I have ordinal data on happiness of citizens from multiple countries (from the European Value Study) and I have continuous data on the GDP per capita of multiple countries from the World Bank. Both of ...
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What statistical tests should I use?
I am comparing the association between BRCA1 gene mutations and the prevalence of ovarian cancer by ethnicity (5 ethnic groups). I collected data on the number of patients who develop ovarian cancer ...
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Finding association of attributes with node centrality/ degree value
I've run SNA and got the value of centrality of each node. I classified the centrality value into two group. Then based on this grouping, I would like to find the association of the attribute(gender, ...
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How measure feature association when you deal with multilabel target AND multilabel features?
I have a dataset of categorical multilabel targets AND features. My target is multilabel and I observe a large overlap of classes between sets. I have several features for each row that may or may not ...
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How to find significance of Eta correlation?
I am running a test of association between a categorical/multinomial variable (example: hair color) and a continuous/nominal variable (example: ratings of happiness 0-100). I believe the correct test ...
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Fisher test: odds ratio greater than 1 and p-value greater than 0.05
Is it possible that in the output of fisher.test() in R p-value is grater than 0.05 and odds ratio is not equal to 1?
I have this table.
The output of fisher.test() is:
P-value=0.1789 indicates no ...
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What statistical test would be appropriate for my study?
I am looking at the difference in flow rate on composition of coarse matter.
I have set flow rate into two categories. Above and below 3700 L/s.
I have raw data that consists (grams of matter for ...
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How to statistically test whether the co-existing of events is more likely after a treatment (paired data)
I have some nominal (binary) data at two time points. The data structure are as follows:
participant
event A
event B
event C
event D
1 Before
TRUE
TRUE
TRUE
FALSE
2 Before
TRUE
FALSE
TRUE
FALSE
3 ...
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What statistical methods can I use to determine the popularity of item combinations taken from two groups?
Let's say I have two tables, listing projects with the programming languages and frameworks they use:
...
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Correlation and association matrix different data types
I'm an undergraduate computer science student with little background in statistics/data science.
I have a high-dimensional dataset (about 450 variables and 90000 entries). I have nominal (non-binary, ...
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Poisson Regression and homogenous association
Let's consider a log-linear Poisson model with three variables A, F, C such that the model is a homogeneous line-by-line association model in AF.
How on earth the maximum likelihood equations are, for ...
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Measure for the probability that a criteria (a subevent) is fulfilled conditional on an event (the mainevent) happening
Suppose I have a list of events over years. In this list multiple events can happen in the same year and for each event there are several characteristics / criteria. For example, you could have ...
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Exploring the differences in proportions
I have the following data:
Score
Treatment 1
Treatment 2
>=50%
10
16
< 50 %
21
7
I need to describe the differences in the proportion of individuals with score <50% in the two treatment ...
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Collapsibility Conditions for Multiway Tables
Why is the WX conditional association the same as the WX marginal association in log linear model (WX, XYZ) (four-way table) and not in the log linear model (WX, WZ, XY, YZ)?
I saw on the internet to ...
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P trend and association [closed]
what does p trend mean for categorical analyzes with HR (proportionnal regression cox) ?
Do we have to interpret this with HR on our result ?
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Tree association index
I have two binary trees A and B. Each tip in tree A is labelled either a or b, and each tip in tree B is labelled either a, b or c. I have a statistic that quantifies the degree of clustering of ...
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Linking features via correlations
I am comparing two tables with different size of features (rows), but the same number of samples (columns). I know that a significant part of the features are the same in the two tables, but they are ...
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Market Basket Analysis - Interpretation of mirrored association rules
I have performed Market Basket Analysis on sales data, that comes from non-sequential receipts. I've read into the meaning of the different metrics, but there is one thing I don't understand. When ...
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Multiple associations in Relative Risk and Odds Ratio
I am a frequent user of the package (epiR), especially in Relative Risk and Odds Ratio.
Generally, I use several covariates to make the associations (RR or OR), for example: outcome (death) versus ...
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Is there any reference justificating a P<0.10 as a cutoff for likelihood-ratio tests?
I am conducting log-likelihood-ratio tests to examine the goodness of fit of two competing logistic regression models. The test is the traditional log-likelihood-ratio test, in which I compare the ...
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In a chi-square test of association, what are the "dependent" variables?
The chi-square test of association is used to determine if there is an association between two categorical variables.
In statistics, we call "dependent variable" a variable that is supposed ...
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Is the correlation coefficient more than a measure of the tightness of fit? [duplicate]
or in other words, to what extent and under what conditions, the correlation coefficient can be indicative of what a regression slope signifies (in the case of a linear bivariate model)?
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Using logistic regression to determine the association between covariates and being in the treatment group
I want to determine if there is an association between my covariates (age, gender, bmi) and whether the person is in the treatment group or not. I ran logistic regression using each covariate in term ...
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A formal definition of a "measure of association"
I've been trying to come up with a formal definition for a 'measure of association'. An intuitive definition might be something along the lines of 'a function that tells you about the existence or ...
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How to use the chi squared test (a biological investigation)
Imagine four habitats - A, B, C and D - set up in a choice chamber and two species of the same family, X and Y, 20 individuals of each.
In a series of experiments, we put these species into the choice ...
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Study association between continuous and categorical variables
I have independent continuous variables like Age, Price and outcome variable like purchased ...
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Correlation coefficient to use for data with non linear relationship
I am working with the following y = x^2 data type for my test studies
...
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How Do I detect window of X corresponding to Y (nonlinearly)?
I have two continuous variables that may have nonlinear relationship.
The dataset contains multiple recordings of X, each corresponding to multiple recordings of Y.
The exact matching is unknown.
How ...
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Accuracy estimator for scan sample of categorical time series
Suppose we are tracking the behavior of some agent over time, and this agent can only exist in two states (+, -). This agent is only active for 20 timesteps, but we are only able to observe the agent ...
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on the use of R squared as a measure of predictive accuracy for non-parametric models such as random forest
I am confused. I know there are a couple of similar questions about $R^2$ but I hope I get some opinions on this particular matter.
I have trained a random forest and other nonparametric regression ...
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Simulating an example of correlation attenuation due to measurement error
I'm trying to simulate an example of the attenuation of an association due to measurement error. According to the attenuation formula from classical test theory, the presence of measurement error ...
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Do multiple chi square tests between a set of variables violate the assumption of independence?
I have a dataset of 28 nominal and ordinal categorical variables, 161 observations. If I use chi sq tests of association between variables, for example I test var1 and var2, var1 and var3 and var1 and ...
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Alternative to Bonferroni Correction when performing multiple one-vs-rest association tests
My question anonymizes the 'nouns' of the question to protect my employer. It is not really about lab rats and experimental treatments.
I am also coming more from a Machine Learning background, so my ...
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How to analyse association between two (paired) sets of measurements, when arbitrary to which set each member of a pair belongs
I have pairs of measurements and need advice to select a measure of association between the measurements. The special aspect that has me confused is the symmetry: there is no reason to allocate a ...
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Association between groups of features and outcome variable
I am working with a high-dimensional dataset (e.g., ~150 features) and possible confounders (e.g., ~10 features to control). The goal is to identify association with an outcome variable that is ...
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How do I apply spearman rank correlation on one continuous variables like sales data in and other discrete variable like Industries count?
I have a dataframe with total sales of around 500 product categories in each row. So there are 500 columns in my dataframe. I am trying to find the highest correlated category with my another dataset ...
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What is the test for association between 5 point likert scale and ordinal variable? [duplicate]
Note the likert scale is
very satisfied
2.satisfied
Don't know
Unsatisfied
5.very unsatisfied
And the ordinal variable is anxiety:
1.normal
2.mild
3.moderate
4.severe
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Regression for prediction versus understanding independent associations
I see that regression is used for 2 main purposes:
To develop a predictive model for future use
To understand associations. Specifically, to know which of the predictors have an "independent ...
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What method to use to determine the association between multiple choice question in a questionnaire and continuous value outcome
I have data from a questionnaire to determine the level of diabetic foot care knowledge (DFCK) among undergraduate Podiatry students. The DFCK (i.e. outcome) is a score based on the total number of ...
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How to test if con-infection between microbes is correlated?
I am analyzing the results from a diagnostic test that looks for the presence of micro-organisms in humans. In some cases, there is only one microbe but in others, there are multiple infections.
What ...
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Visually, how strong would you rate the association between this nominal predictor variable and continuous response variable?
I've yet to find an easy-to-understand and easy-to-implement way to statistically model the strength of association between nominal data and continuous data. So I'm trying to get a rough idea visually ...
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How can I compare the predictive power or association of two variables of different nature?
I am dealing with the following problem:
We have 3 variables:
A continuous variable (0 to 1), that is a scoring for people.
A discrete variable, offered by a partner, in the range 1..10. That is also ...
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Bivariate copula for count and continuous variables?
I'm interested in fit a Copula from my bivariate data with a count variable $Y_{i}$ and a continuous one $X_{i}$.
So, let $F(x)$ and $G(x)$ be the margins for the mentioned variables and $C$ the ...
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Interpretable Measure of Association between a dichotomous variable and a variable with more than two ordered categories
What measure of association including a positive or negative sign can be used to evaluate the association between a dichotomous variable (i.e. YES, NO) and a categorical ordinal variable (ie. A lot, ...
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Relationship between categorical variable (depression) and a continuous variable
I appreciate this question is quite simple to ask but I want to make sure I direct myself in the right direction.
I want to test the association between a continuous variable (BMI) and a categorical ...
