Negative Binomial Distribution
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The Negative Binomial pdf is the probability of achieving 𝑟 failures before the 𝑥th success, with 𝑝
being the probability of a success.
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Probability Density Function (PDF)
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Cumulative Distribution Function (CDF)
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where Ix(𝑎, 𝑏) is the regularized incomplete Beta function.
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• Support 𝑥 ∈ {1,2,3, ...}
• Probability parameter, 𝑝: 0 ≤ 𝑝 ≤ 1
• Failure parameter, 𝑟: 𝑟 > 0
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