Questions tagged [chi-square-test]

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How to get correlation between the categories of two categorical variable?

I have a categorical variable with 2 categories ("Health") ('healthy', 'not_healthy') and another categorical variable ("country") with 5 categories ("english", "eua&...
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15 views

Which are the features selection techniques depending on the combination on cat num columns in independent and dependent features?

I am very confused: For what I understood I should: Multicollinearity check with Pearson corr and possibly consider to drop multicolliner features Then? I am very confused feature selection should be ...
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21 views

ANOVA Feature Scoring

in order to score features, in ORANGE, using ANOVA scoring, the features should have a normal distribution? Thank you, J
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1answer
24 views

Chi-Squared test: ok for selecting significant features?

I would have a question on the contingency table and its results. I was performing this analysis on names starting with symbols as a possible feature, getting the following values: ...
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1answer
17 views

What is the best alternative for Fisher's Exact test for contigency tables that are NOT 2x2?

I am a newbie to data mining. I am trying to find associations between two categorical variables. Since more than 20% of my expected frequencies are less than 5, I wanted to use Fisher exact test but ...
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1answer
103 views

Interpreting the results based on Granger Causality test

I am trying to use Granger Causality test: https://www.statsmodels.org/stable/generated/statsmodels.tsa.stattools.grangercausalitytests.html to assess whether "positivity score" affects ...
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42 views

Chi Square Test Goodness of Fit

I want to use a chi square test but I'm unsure if I'm using it right. The KickStarter website shows the frequency of main categories projects. It is updated once a day. I got a data set of KickStarter ...
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1answer
42 views

Chi-square test - how can I say if attributes are correlated?

I am experimenting a course's teorical contents on this dataset. After data cleaning, I am trying to use chi-square test. I wrote the following code: ...
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2answers
161 views

Linear regression with a fixed intercept and everything is in log

I have a set of values for a surface (in pixels) that becomes bigger over time (exponentially). The surface consists of cells that divide over time. After doing some modelling, I came up with the ...
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42 views

Chi-squared test for nominal (categorical) data with multiple variables

I want to use Chi-squared testing on my data set to determine if my data set is seasonal or not. To explain my data a bit further. I have split it up by dates into four groups (spring, summer, winter, ...
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38 views

Using a Subset of Categories in a Categorical Column

I have a XGBoost model and I'm going to retrain it by adding new features. There is a column in my data and it's about professions of the customers. It has 60 categories. I suppose there is no need to ...