[Solved] What does the Chi-squared test mainly check in data? — Ans: If two categorical variables are related | SciPy

SciPy - Statistical Tests

What does the Chi-squared test mainly check in data?

AIf two categorical variables are related

BIf the mean of a dataset is zero

CIf data follows a normal distribution

DIf two numerical variables have a linear relationship

Step-by-Step Solution

Solution:

Step 1: Understand the purpose of the Chi-squared test
The Chi-squared test is used to check if there is a relationship between two categorical variables by comparing observed and expected counts.
Step 2: Compare options with the test purpose
Only If two categorical variables are related correctly describes this purpose. Options B, C, and D describe other statistical tests or concepts.
Final Answer:
If two categorical variables are related -> Option A
Quick Check:
Chi-squared test = relationship between categories [OK]

Quick Trick: Chi-squared tests category links, not means or correlations [OK]

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