Boxes of trout eggs were buried at five different stream locations and retrieved at 4 different times. The number of surviving eggs was recorded. The box was not returned to the stream.
data(troutegg)
A data frame with 20 observations on the following 4 variables.
survive
the number of surviving eggs
total
the number of eggs in the box
location
the location in the stream with levels 1
2
3
4
5
period
the number of weeks after placement that the
box was withdrawn levels 4
7
8
11
Hinde J. and Demetrio C. (1988) Overdispersion: Models and estimation. Computational Statistics and Data Analysis. 27, 151-170.