A colleague teaching college algebra wrote in the R-sig-teaching list asking for assistance in plotting the solutions to the inequality x^2 – 3 > 0. This type of display is handy in providing a graphical solution to accompany an analytic one. RThe plot…
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Example 8.30: Compare Poisson and negative binomial count models
How similar can a negative binomial distribution get to a Poisson distribution?When confronted with modeling count data, our first instinct is to use Poisson regression. But in practice, count data is often overdispersed. We can fit the overdispersio…