You test a hypothesis of independence of two variables.The number of observations is 500 and you have classified the data into a 4 × 4 contingency table.The test statistic has ________ degrees of freedom.
A)16
B)9
C)499
D)498

Question

Quizplus · Accepted Answer

The degrees of freedom for the chi-square test of independence with a 4x4 contingency table is calculated as:

df = (number of rows - 1) x (number of columns - 1)
   = (4 - 1) x (4 - 1)
   = 9

Therefore, the answer is choice B (9).

You Test a Hypothesis of Independence of Two Variables