menarche                package:MASS                R Documentation

Age of Menarche data

Description:

     Proportions of female children at various ages during adolescence
     who have reached menarche.

Usage:

     menarche

Format:

     This data frame contains the following columns:

     'Age' Average age of the group.  (The groups are reasonably age
          homogeneous.)

     'Total' Total number of children in the group.

     'Menarche' Number who have reached menarche.

Source:

     Milicer, H. and Szczotka, F. (1966) Age at Menarche in Warsaw
     girls in 1965. _Human Biology_ *38*, 199-203.

     The data are also given in
      Aranda-Ordaz, F.J. (1981) On two families of transformations to
     additivity for binary response data. _Biometrika_ *68*, 357-363.

References:

     Venables, W. N. and Ripley, B. D. (2002) _Modern Applied
     Statistics with S._ Fourth edition.  Springer.

Examples:

     mprob <- glm(cbind(Menarche, Total - Menarche) ~ Age,
                  binomial(link = probit), data = menarche)

