genotype                package:MASS                R Documentation

_R_a_t _G_e_n_o_t_y_p_e _D_a_t_a

_D_e_s_c_r_i_p_t_i_o_n:

     Data from a foster feeding experiment with rat mothers and litters
     of four different genotypes: 'A', 'B', 'I' and 'J'. Rat litters
     were separated from their natural mothers at birth and given to
     foster mothers torear.

_U_s_a_g_e:

     genotype

_F_o_r_m_a_t:

     The data frame has the following components:

     '_L_i_t_t_e_r' genotype of the litter.

     '_M_o_t_h_e_r' genotype of the foster mother.

     '_W_t' Litter average weight gain of the litter, in grams at age 28
          days. (The source states that the within-litter variability
          is negligible.)


_S_o_u_r_c_e:

     Scheffe, H. (1959) _The Analysis of Variance_ Wiley p. 140.

     Bailey, D. W. (1953) _The Inheritance of Maternal Influences on
     the Growth of the Rat._ Unpublished Ph.D. thesis, University of
     California. Table B of the Appendix.

_R_e_f_e_r_e_n_c_e_s:

     Venables, W. N. and Ripley, B. D. (1999) _Modern Applied
     Statistics with S-PLUS._ Third Edition. Springer.