delivery             package:robustbase             R Documentation

_D_e_l_i_v_e_r_y _T_i_m_e _D_a_t_a

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

     Delivery Time Data, from Montgomery and Peck (1982). The aim is to
     explain the time required to service a vending machine (Y) by
     means of the number of products stocked (X1) and the distance
     walked by the route driver (X2).

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

     data(delivery)

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

     A data frame with 25 observations on the following 3 variables.

     '_n._p_r_o_d' Number of Products

     '_d_i_s_t_a_n_c_e' Distance

     '_d_e_l_T_i_m_e' Delivery time

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

     Montgomery and Peck (1982, p.116)

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

     P. J. Rousseeuw and A. M. Leroy (1987) _Robust Regression and
     Outlier Detection_; Wiley, page 155, table 23.

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

     data(delivery)
     summary(lm.deli <- lm(delTime ~ ., data = delivery))

     delivery.x <- as.matrix(delivery[, 1:2])
     c_deli <- covMcd(delivery.x)
     c_deli

