Yule's coefficient of association is undefined when:
A. Attributes are independent
B. N is odd
C. (AB)(αβ) + (Aβ)(αB) = 0
D. (AB) = 0
Answer: Option C
Solution (By JKSSB Mock Tests)
Yule's Q = [(AB)(αβ) - (Aβ)(αB)] / [(AB)(αβ) + (Aβ)(αB)]; if the denominator is zero (all cells zero or impossible configuration), Q is undefined, though this rarely occurs in real data.
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