menarche                package:MASS                R Documentation

_A_g_e _o_f _M_e_n_a_r_c_h_e _i_n _W_a_r_s_a_w

_D_e_s_c_r_i_p_t_i_o_n:

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

_U_s_a_g_e:

     menarche

_F_o_r_m_a_t:

     This data frame contains the following columns:

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

     '_T_o_t_a_l' Total number of children in the group.

     '_M_e_n_a_r_c_h_e' Number who have reached menarche.


_S_o_u_r_c_e:

     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.

_R_e_f_e_r_e_n_c_e_s:

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

_E_x_a_m_p_l_e_s:

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