juul                  package:ISwR                  R Documentation

_J_u_u_l'_s _I_G_F _d_a_t_a

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

     The 'juul' data frame has 1339 rows and 6 columns. It contains a
     reference sample of the distribution of insulin-like growth factor
     (IGF-I), one observation per subject in various ages, with the
     bulk of the data collected in connection with school physical
     examinations.

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

     juul

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

     This data frame contains the following columns:

     '_a_g_e' a numeric vector (years).

     '_m_e_n_a_r_c_h_e' a numeric vector. Has menarche occurred (code 1: no, 2:
          yes)?

     '_s_e_x' a numeric vector (1: boy, 2: girl).

     '_i_g_f_1' a numeric vector, insulin-like growth factor (microgram per
          liter).

     '_t_a_n_n_e_r' a numeric vector, codes 1-5: Stages of puberty ad modum
          Tanner.

     '_t_e_s_t_v_o_l' a numeric vector, testicular volume (ml).


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

     Original data.

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

     plot(igf1~age, data=juul)

