Variables:
A data frame with 35 observations on the following 4 variables.
-
dose
-
a numeric vector of dose values
-
number
-
a numeric vector containing counts of remaining earthworms in the container
-
total
-
a numeric vector containing total number of earthworms put in the containers
Details
At dose 0 around half of the earthworms is expected be in each of the two containers. Thus it is not appropriate to fit an ordinary logistic regression with log(dose) as explanatory variable to these data as it implies an upper limit of 1 at dose 0 and in fact this model does not utilise the observations at dose 0 (see the example section below).
