The variable secondary sex, abbreviated as SecSex, is a
count of male papillary processes. This variable is a measure of endocrine
activity, with reduced counts indicative of feminization of male fish. See
Table 8.17 for an example dataset. Analyze these data for a decrease in
SecSex using the Jonckheere–Terpstra test and using a Poisson errors GLMM and
the Dunnett–Hsu test. Fit a regression model (normal or Poisson errors) to
these data if possible and estimate EC10.