For a Two-Way Contingency Table, the Degrees of Freedom for the Chi-Square

Multiple Choice

For a two-way contingency table, the degrees of freedom for the chi-square test of independence are defined as.

A) $( r - 1 ) + ( c - 1 )$
B) $( r - 1 ) ( c - 1 )$
C) $\frac { ( r - 1 ) } { ( c - 1 ) }$
D) $( r - 1 ) - ( c - 1 )$