sleep1                 package:alr3                 R Documentation

_S_l_e_e_p _i_n _m_a_m_m_a_l_s

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

     Includes species averages for 62 mammals.

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

     This data frame contains the following columns:

     _S_W_S Slow wave nondreaming sleep, hrs/day

     _P_S Paradoxical dreaming sleep, hrs/day

     _T_S Total sleep, hrs/day

     _B_o_d_y_W_t Body weight in kg

     _B_r_a_i_n_W_t Brain weight in g

     _L_i_f_e Maximum life span, years

     _G_P Gestation time, days

     _P Predation index, 1=low,5=hi

     _S_E Sleep exposure index 1=exposed, 5=protected

     _D Danger index, 1=least, 5=most

     _S_p_e_c_i_e_s Species of animal

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

     Allison, T. and Cicchetti, D. (1976).  Sleep in Mammals:
     Ecological and Constitutional Correlates  _Science_, vol. 194, pp.
     732-734.

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

     Weisberg, S. (2005). _Applied Linear Regression_, 3rd edition. New
     York: Wiley, Section 6.2.

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

     data(sleep1)

