Coefficient of contingency, i.e., c is calculated as
A. $$\frac{{\sqrt {{{\text{X}}^2}} }}{{\text{N}}}$$
B. $$\sqrt {\frac{{{{\text{X}}^2}}}{{\text{N}}}} $$
C. $$\frac{{{{\text{X}}^2}}}{{{\text{N}} + {{\text{X}}^2}}}$$
D. $$\sqrt {\frac{{{{\text{X}}^2}}}{{{\text{N}} + {{\text{X}}^2}}}} $$
Answer: Option D
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