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Free Negative Binomial Calculator for New Zealanders

The negative binomial models the number of trials x needed to achieve r successes when each trial succeeds with probability p. The calculator returns P(X = x) and the distribution mean and variance.

Parameters

5
1100
0.40
0.010.99
12
1200
P(X = x)
-
negative binomial PMF

Probability the rth success happens on trial x.

P(X <= x)-
Mean (r/p)-
Variance-

About our Negative Binomial Calculator

Disclaimer: This calculator is for information only and does not constitute financial advice. Real-world figures may differ due to fees, rounding, rate changes, and policy specifics. Always confirm figures with the relevant provider before signing anything.