A contingency table test with 4 rows and 30 degrees of freedom implies that the table must have:
A) 7 columns
B) 9 columns
C) 11 columns
D) 13 columns
E) 15 columns

Question

Quizplus · Accepted Answer

The degrees of freedom for a contingency table are calculated as (rows - 1) * (columns - 1). Given 4 rows and 30 degrees of freedom, solving the equation (4-1) * (columns - 1) = 30 gives columns - 1 = 10, so the table must have 11 columns.

A Contingency Table Test with 4 Rows and 30 Degrees