bdf                   package:nlme                   R Documentation

_L_a_n_g_u_a_g_e _s_c_o_r_e_s

_D_e_s_c_r_i_p_t_i_o_n:

     The 'bdf' data frame has 2287 rows and 25 columns of language
     scores from grade 8 pupils in elementary schools in The
     Netherlands.

_U_s_a_g_e:

     data(bdf)

_F_o_r_m_a_t:

     _s_c_h_o_o_l_N_R a factor denoting the school.

     _p_u_p_i_l_N_R a factor denoting the pupil.

     _I_Q._v_e_r_b a numeric vector of verbal IQ scores

     _I_Q._p_e_r_f a numeric vector of IQ scores.

     _s_e_x Sex of the student.

     _M_i_n_o_r_i_t_y a factor indicating if the student is a member of a
          minority group.

     _r_e_p_e_a_t_g_r an ordered factor indicating if one or more grades have
          been repeated.

     _a_r_i_t_P_R_E_T a numeric vector

     _c_l_a_s_s_N_R a numeric vector

     _a_r_i_t_P_O_S_T a numeric vector

     _l_a_n_g_P_R_E_T a numeric vector

     _l_a_n_g_P_O_S_T a numeric vector

     _s_e_s a numeric vector of socioeconomic status indicators.

     _d_e_n_o_m_i_n_a a factor indicating of the school is a public school, a
          Protestant private school, a Catholic private school, or a
          non-denominational private school.

     _s_c_h_o_o_l_S_E_S a numeric vector

     _s_a_t_i_p_r_i_n a numeric vector

     _n_a_t_i_t_e_s_t a factor with levels '0' and '1'

     _m_e_e_t_i_n_g_s a numeric vector

     _c_u_r_r_m_e_e_t a numeric vector

     _m_i_x_e_d_g_r_a a factor indicating if the class is a mixed-grade class.

     _p_e_r_c_m_i_n_o a numeric vector

     _a_r_i_t_d_i_f_f a numeric vector

     _h_o_m_e_w_o_r_k a numeric vector

     _c_l_a_s_s_s_i_z a numeric vector

     _g_r_o_u_p_s_i_z a numeric vector

_S_o_u_r_c_e:

     <URL: http://stat.gamma.rug.nl/snijders/multilevel.htm>

_R_e_f_e_r_e_n_c_e_s:

     Snijders, Tom and Bosker, Roel (1999), _Multilevel Analysis: An
     Introduction to Basic and Advanced Multilevel Modeling_, Sage.

_E_x_a_m_p_l_e_s:

     summary(bdf)

