orangejuice               package:qcc               R Documentation

_O_r_a_n_g_e _j_u_i_c_e _d_a_t_a

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

     Frozen orange juice concentrate is packed in 6-oz cardboard cans.
     These cans are formed on a machine by spinning them from cardboard
     stock and attaching a metal bottom panel. A can is then inspected
     to determine whether, when filled, the liquid could possible leak
     either on the side seam or around the bottom joint. If this occurs
     a can is considered nonconforming. The data were collected as 30
     samples of 50 cans each at half-hour intervals over a three-shift
     period in which the machine was in continuous operation. From
     sample 15 used a new bacth of cardboard stock was punt into
     production. Sample 23 was obtained when an inexperienced operator
     was temporarily assigned to the machine. After the first 30
     samples, a machine adjustment was made. Then further 24 samples
     were taken from the process.

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

     data(orangejuice)

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

     A data frame with 54 observations on the following 4 variables:

     _s_a_m_p_l_e sample id

     _D number of defectives

     _s_i_z_e sample sizes

     _t_r_i_a_l trial samples (TRUE/FALSE)

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

     Montgomery, D.C. (1991) _Introduction to Statistical Quality
     Control_, 2nd ed, New York, John Wiley & Sons, pp. 152-155.

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

     data(orangejuice)
     orangejuice$d <- orangejuice$D/orangejuice$size
     attach(orangejuice)
     summary(orangejuice)
     boxplot(d ~ trial)
     mark <- ifelse(trial, 1, 2)
     plot(sample, d, type="b", col=mark, pch=mark)

