Podcast #128: We chat with Kent C Dodds about why he loves React and discuss what life was like in the dark days before Git. Listen now.
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Excessive 0's in a variable compared to a specified reference distribution. Regression approaches include zero-inflated models and hurdle (2-part) models. For count data, zero-inflated and hurdle models based on Poisson or negative binomial distributions are common (ZIP/ZINB and HP/HNB).

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I have a situation where an experiment is being run in the following manner: A one stage cluster sampling (I think this is accurate description) is conducted whereby there are multiple organizations …
asked Aug 8 '18 by B_Miner
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Can anyone show how the expected value and variance of the zero inflated Poisson, with probability mass function $$ f(y) = \begin{cases} \pi+(1-\pi)e^{-\lambda}, & \text{if }y=0 \\ (1-\pi)\frac{\lamb …
asked Nov 20 '11 by B_Miner