The formula of calculating the variance for negative binomial distribu

1.	The formula of calculating the variance for negative binomial distribution is
A.	rq ⁄ p²
B.	pq ⁄ r²
C.	rp ⁄ q²
D.	rq ⁄ p
Answer» B. pq ⁄ r²

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The formula of calculating the variance for negative binomial distribution is

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