bpd                 package:SemiPar                 R Documentation

_B_r_o_n_c_h_o_p_u_l_m_o_n_a_r_y _d_y_s_p_l_a_s_i_a _d_a_t_a

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

     The 'bpd' data frame has data on 223 human babies.

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

     data(bpd)

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

     This data frame contains the following columns:

     _b_i_r_t_h_w_e_i_g_h_t birthweight of baby (grammes).

     _B_P_D an indicator of presence of bronchopulmonary dysplasia (BPD):
          0=absent, 1=present.

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

     Pagano, M. and Gauvreau, K. (1993). _Principles of Biostatistics_.
     Duxbury Press.

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

     Ruppert, D., Wand, M.P. and Carroll, R.J. (2003)
      _Semiparametric Regression_ Cambridge University Press.
      <URL: http://stat.tamu.edu/~carroll/semiregbook/>

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

     library(SemiPar)
     data(bpd)
     attach(bpd)
     plot(birthweight,BPD)
     boxplot(split(birthweight,BPD),col="green")

