drill                  package:Rlab                  R Documentation

_D_r_i_l_l _t_e_s_t_i_n_g _r_e_s_u_l_t_s

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

     The data set 'drill' contains the results of testing two types of
     drill bits in the manufacture of compressors. There were two
     brands considered (Besley and Cleveland), and the measurements are
     the number of holes drilled until the bit breaks. The tests were
     done under the same manufacturing conditions, and the influence on
     performance due to factors other than the brand was minimized.

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

     A data frame with 14 observations on the following 3 variables.

     _b_r_a_n_d : drill manufacturer (Beasly or Cleveland)

     _h_o_l_e_s : number of holes drilled before break

     _p_r_i_c_e : price of a bit

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

     lplot(drill$brand,drill$price/drill$holes,
     main='Price per Hole for Drill Bits',ylab='Price per Hole')

