# Quantal Response Analysis for Dose-Mortality Data

Functions are provided that implement the
use of the Fieller's formula methodology, for
calculating a confidence interval for a ratio of
(possibly, correlated) means. See Fieller (1954)
. Here,
the application of primary interest is to studies
of insect mortality response to increasing doses
of a fumigant, or, e.g., to time in coolstorage.
The formula is used to calculate a confidence
interval for the dose or time required to achieve
a specified mortality proportion, commonly 0.5
or 0.99. A vignette demonstrates link functions
that may be considered, and alternative choices of
error family. Note in particular the beta-binomial
error family. See also Maindonald, Waddell,
and Petry (2001) .