Revisit the toxicology example: six groups of beetles were exposed to various concentrations (C) of the insecticide. At the end of the experiment dead beetles in each group were counted.

concentration 10.8 11.6 12.1 12.6 13.1 13.5

death 15 24 26 24 29 29 group size 50 49 50 50 50 49

Consider the logistic regression model

logit[P(death at concentration C)] = 0 + 1 C

1. Under the assumption 1 = 0, write down the log-likelihood function (of 0 alone).