Chi-Squared Test

Use: The Chi-Squared test is used to determine if there's a significant association between two categorical variables. It helps assess whether there is a relationship between the variables or if they are independent.

Example: Investigating whether there is an association between gender (male or female) and the preference for a particular brand of soft drink.

Column Requirement: Categorical data for both variables.

Steps:

1. Select two categorical columns (e.g., gender)

2. Ensure expected frequencies in each cell of the table are not too low (generally above 5) for reliable results.

3. Compute the Chi-squared test statistic.

4. Evaluate the p-value associated with the test statistic.