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scipy.special.nbdtrc

# scipy.special.nbdtr

`scipy.special.``nbdtr`(k, n, p) = <ufunc 'nbdtr'>

  Negative binomial cumulative distribution function

  Returns the sum of the terms 0 through k of the negative binomial distribution:

      sum((n+j-1)Cj p**n (1-p)**j,j=0..k).

  In a sequence of Bernoulli trials this is the probability that k or fewer failures precede the nth success.