While conducting a chi-square test to examine the independence of attributes in an m × n contingency table, what formula determines the degree of freedom?

Correct option is D

· In a chi-square test for independence, the degree of freedom (df) for an m × n contingency table is calculated as: df = (m − 1) × (n − 1).
· Here, m represents the number of rows and n represents the number of columns.
· This formula ensures the correct estimation of expected frequencies in the table.