twins                 package:UsingR                 R Documentation

_B_u_r_t'_s _I_Q _d_a_t_a _f_o_r _t_w_i_n_s

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

     IQ data of Burt on identical twins that were separated near birth.

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

     data(twins)

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

     A data frame with 27 observations on the following 3 variables.

     _F_o_s_t_e_r IQ for twin raised with foster parents

     _B_i_o_l_o_g_i_c_a_l IQ for twin raised with biological parents

     _S_o_c_i_a_l Social status of biological parents

_D_e_t_a_i_l_s:

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

     This data comes from the R package that accompanies Julian
     Faraway's notes _Practical Regression and Anova in R_ (now a
     book).

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

     data(twins)
     plot(Foster ~ Biological, twins)

