Zero-inflated Poisson regression is  the model for count data with the excess zeros. It supposes that with probability p the only possible observation is 0 and with the probability 1 p a random variable with the Poisson distribution is observed. For instance, when manufacturing equipment is properly aligned, defects might be almost impossible. But when it is misaligned, defects might happen according to a Poisson distribution. Both probability p of the perfect zero defect state and the mean number of defects λ in the imperfect state might depend on covariates. The parameters in this type of models can be estimated using maximum likelihood estimation.

Posted Date: 8/1/2012 1:45:36 AM | Location : United States

Ask an Expert

Related Discussions:- Zero-inflated poisson regression, Assignment Help, Ask Question on Zero-inflated poisson regression, Get Answer, Expert's Help, Zero-inflated poisson regression Discussions

Write discussion on Zero-inflated poisson regression
Your posts are moderated

Write your message here..

Related Questions

Explain johnson-neyman technique, Johnson-Neyman technique:  The technique ... Johnson-Neyman technique:  The technique which can be used in the situations where analysis of the covariance is not valid because of the heterogeneity of slopes. With this method

Cellular proliferation models, Cellular proliferation models : Models are u... Cellular proliferation models : Models are used to describe the growth of the  cell populations. One of the example is the deterministic model   where N(t) is the number of cel

Doane''s rule, A rule for computing the number of classes to use while cons... A rule for computing the number of classes to use while constructing a histogram and  can be given by   here n is the sample size and ^ γ is the estimate of kurtosis.

Intercropping experiments, Intercropping experiments are the experiments i... Intercropping experiments are the experiments including growing two or more crops at same time on the same patch of land. The crops are not required to be planted nor harvested at

Tree, Tree is the term from the branch of the mathematics which known as t... Tree is the term from the branch of the mathematics which known as the graph theory, used to describe any set of the straight-line segments joining the pairs of points in some pro

Cascadedparameters, Cascadedparameters: A group of parameters which is int... Cascadedparameters: A group of parameters which is interlinked and where selecting the value for the ?rst parameter affects the choice and option available in the subsequent param

The time series analysis on the number of babies, importance of time series... importance of time series on the number of babies given birth

Censored observations, Censored observations : An observation xi on some va... Censored observations : An observation xi on some variable of interest is consired to be censored if it is known that xi Li (left-censored)or xi Ui (right-censored) where Li and Ui

Explain prevalence, Prevalence : The measure of the number of people in a p... Prevalence : The measure of the number of people in a population who have a certain disease at a given point in time. It c an be measured by two methods, as point prevalence and p

Expected-utility maximizer, There are two periods. You observe that Jack co... There are two periods. You observe that Jack consumes 100 apples in period t = 0, and 120 apples in period t = 1. That is, (c 0 ; c 1 ) = (100; 120) Suppose Jack has the util