menarche                package:MASS                R Documentation

_A_g_e _o_f _M_e_n_a_r_c_h_e _d_a_t_a

_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:

     data(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.

_E_x_a_m_p_l_e_s:

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

