tonsil               package:Fahrmeir               R Documentation

_D_a_t_a _S_e_t _o_f _T_o_n_s_i_l _S_i_z_e _i_n _C_h_i_l_d_r_e_n

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

     Children have been classified according to their relative tonsil
     size and  wheater or not they are carriers of Streptococcus
     pyogenes.

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

     data(tonsil)

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

     A data frame with 6 observations on the following 3 variables.

     _S_t_r_e_p_t_o_c_o_c_c_u_s._p a factor with levels 'carriers' 'noncarriers'

     _S_i_z_e numeric, 1, 2 or 3, tonsil size

     _n number of children in group

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

     It may be assumed that tonsil size always starts in the normal
     state  "present but not enlarged" (category 1). If the tonsils
     grow abnormally,  they may become "enlarged" (category 2), if the
     process does not stop,  they may become "greatly enlarged"
     (category 3).

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

     Ludwig Fahrmeir, Gerhard Tutz (1994):  Multivariate Statistical
     Modelling Based on Generalized Linear Models. Springer Series in
     Statistics.  Springer Verlag. New-York  Berlin Heidelberg

_R_e_f_e_r_e_n_c_e_s:

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

     str(tonsil)
     summary(tonsil)

