Use the following information for questions:
Is there a relationship between the color of one's eyes and the comparative lengths of one's index and ring fingers? Students were asked "which finger is longer: your index finger or your ring finger? Or are they the same?" They also reported the color of their eyes (blue, brown, green, or hazel). The analysis of the results is given below.
-What are the degrees of freedom for this test?
A) 2
B) 3
C) 6
D) 12

Question

Use the following information for questions:
Is there a relationship between the color of one's eyes and the comparative lengths of one's index and ring fingers? Students were asked "which finger is longer: your index finger or your ring finger? Or are they the same?" They also reported the color of their eyes (blue, brown, green, or hazel). The analysis of the results is given below. 
-What are the degrees of freedom for this test?
A) 2 
B) 3 
C) 6 
D) 12

Quizplus · Accepted Answer

Degrees of freedom for a chi-square test involving a contingency table are calculated as (R-1)(C-1), where R is the number of rows and C is the number of columns in the table. If the table has 3 rows and 4 columns, the degrees of freedom would be (3-1)(4-1) = 2*3 = 6.

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