SPM – MCQ 77 – Degree of freedom in chi square test

While applying chi-square test to a contingency table of 4 rows and 4 columns, the degrees of freedom would be:
a) 1
b) 4
c) 9
d) 8

Correct answer : c) 9

Degree of freedom = (no. of rows – 1) * (no. of columns – 1)
=(4-1) * (4-1)
=3 * 3
=9