

frets(boot)                                  R Documentation

_H_e_a_d _D_i_m_e_n_s_i_o_n_s _i_n _B_r_o_t_h_e_r_s

_A_r_g_u_m_e_n_t_s_:

      l1: The head length of the eldest son.

      b1: The head breadth of the eldest son.

      l2: The head length of the second son.

      b2: The head breadth of the second son.

_S_U_M_M_A_R_Y_:

     The `frets' data frame has 25 rows and 4 columns.

     The data consist of measurements of the length and
     breadth of the heads of pairs of adult brothers in 25
     randomly sampled families.  All measurements are
     expressed in millimetres.

_D_A_T_A _D_E_S_C_R_I_P_T_I_O_N_:

     This data frame contains the following columns:

_S_O_U_R_C_E_:

     The data were obtained from

     Frets, G.P. (1921) Heredity of head form in man. Genet-
     ica, 3, 193.

_O_T_H_E_R _R_E_F_E_R_E_N_C_E_S_:

     Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Meth-
     ods and Their Application. Cambridge University Press.

     Whittaker, J. (1990) Graphical Models in Applied Multi-
     variate Statistics.  John Wiley.

