down                package:segmented                R Documentation

_D_o_w_n _s_y_n_d_r_o_m_e _i_n _b_a_b_i_e_s

_D_e_s_c_r_i_p_t_i_o_n:

     The 'down' data frame has 30 rows and 3 columns. Variable 'cases'
     means the number of babies with Down syndrome out of total number
     of births  'births' for mothers with mean age 'age'.

_U_s_a_g_e:

     data(down)

_F_o_r_m_a_t:

     A data frame with 30 observations on the following 3 variables.

     '_a_g_e' the mothers' mean age.

     '_b_i_r_t_h_s' count of total births.

     '_c_a_s_e_s' count of babies with Down syndrome.

_S_o_u_r_c_e:

     Davison, A.C. and Hinkley, D. V. (1997) _Bootstrap Methods and
     their Application_. Cambridge University Press.

_R_e_f_e_r_e_n_c_e_s:

     Geyer, C. J. (1991) Constrained maximum likelihood exemplified by
     isotonic  convex logistic regression. _Journal of the American
     Statistical Association_ *86*, 717-724.

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

     data(down)
         

