van den Broek J
Center for Biostastics, University of Utrecht, The Netherlands.
Biometrics. 1995 Jun;51(2):738-43.
When analyzing Poisson-count data sometimes a lot of zeros are observed. When there are too many zeros a zero-inflated Poisson distribution can be used. A score test is presented to test whether the number of zeros is too large for a Poisson distribution to fit the data well.
在分析泊松计数数据时，有时会观察到大量的零值。当零值过多时，可以使用零膨胀泊松分布。本文提出了一种得分检验，以检验零值的数量是否过多，以至于泊松分布无法很好地拟合数据。
