frets                  package: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

_D_e_s_c_r_i_p_t_i_o_n:

     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.

_U_s_a_g_e:

     frets

_F_o_r_m_a_t:

     This data frame contains the following columns:


     '_l_1' The head length of the eldest son.

     '_b_1' The head breadth of the eldest son.

     '_l_2' The head length of the second son.

     '_b_2' The head breadth of the second son.

_S_o_u_r_c_e:

     The data were obtained from

     Frets, G.P. (1921) Heredity of head form in man. _Genetica_, *3*,
     193.

_R_e_f_e_r_e_n_c_e_s:

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

     Whittaker, J. (1990) _Graphical Models in Applied Multivariate
     Statistics_. John Wiley.