Effects of insecticides on mortality

The data concerns two insecticides (deguelin, and a mixture of deguelin and rotenone). A total of 575 insects were exposed to different doses of one of the two insecticides. After exposure, it was recorded if the insect died or not.

drug: type of insecticide. A factor with levels D (deguelin) M (mixture)
logdose: natural logarithm of dose of insecticide
status of insect: dead=1, alive=0 (numeric vector)