Roacheggs {PASWR} | R Documentation |
A laboratory is interested in testing a new child friendly pesticide
on Blatta orientalis (oriental cockroaches). Scientists apply the new
pesticide to 81 randomly selected Blatta orientalis oothecae (eggs).
The results from the experiment are stored in the data frame
Roacheggs
in the variable eggs
. A zero in the variable
eggs
indicates that nothing hatched from the egg while a 1
indicates the birth of a cockroach. Data is used in Example 7.16.
data(Roacheggs)
A data frame with 81 observations on the following variable:
eggs
Ugarte, M. D., Militino, A. F., and Arnholt, A. T. (2008) Probability and Statistics with R. Chapman & Hall/CRC.
attach(Roacheggs) p <- seq(0.1, 0.9, 0.001) negloglike <- function(p){-(sum(eggs)*log(p) + sum(1-eggs)*log(1-p))} nlm(negloglike, .2) detach(Roacheggs)