yarnred                 package:Rlab                 R Documentation

_Y_a_r_n _t_e_n_s_i_l_e _s_t_r_e_n_g_t_h _e_x_p_e_r_i_m_e_n_t - _a_v_e_r_a_g_e_d _m_e_a_s_u_r_e_m_e_n_t_s

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

     The data set 'yarnred' is from a team project to investigate the
     effect
 of count number and yarn type on the tensile strength of
     yarn. The Uster
 Tensorapid 3, a standard machine for measuring
     tensile strength, was used
 to take 10 measurements of strength
     from each of 6 yarn cones (one of each
 type and count, 10 feet
     between measurements on each cone). The 10
 measurements for each
     cone are not true replications because the yarn cones
 should be
     the experimental unit. Thus we have reduced the data by averaging
     over the 10 measurements for each cone.

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

     A data frame with 6 observations on the following 4 variables.

     _c_o_u_n_t : thread count (24 or 36)

     _t_y_p_e : yarn type (AirJet, OpenEnd or Ring)

     _t_e_n_s_i_l_e : tensile strength (average of 10 measurements)

     _s_t_d : standard deviation amoung the 10 measurements

