Score test for overdispersion in Poisson regression {Rfast2}

Score test for overdispersion in Poisson regression

Description

Score test for overdispersion in Poisson regression.

Usage

overdispreg.test(y, x)

Arguments

y

A vector with count data.

x

A numerical matrix with predictor variables.

Details

A score test for overdispersion in Poisson regression is implemented.

Value

A vector with two values. The test statistic and its associated p-value.

Author(s)

Michail Tsagris.

R implementation and documentation: Michail Tsagris [e-mail].

References

Yang Z., Hardin J.W. and Addy C.L. (2009). A score test for overdierpsdion in Poisson regression based on the generalised Poisson-2 model. Journal of Statistical Planning and Inference, 139(4): 1514–1521.

See Also

ztp.reg, censpois.mle wald.poisrat

Examples

y <- rnbinom(100, 10, 0.4)
x <- rnorm(100)
overdispreg.test(y, x)