Western Airlines merged with a smaller airline recently.Every day since the merger, a random sample of 30 Western flightshas been analyzed. A flight that takes off more than 10 minutesafter its scheduled departure time is considered to be late;otherwise, it is not late. Western’s performance over the past 10days is shown in the table below.
Day1 2 3 4 5 6 7 8 9 10
# Late Flights 4 2 5 9 2 3 3 1 2 8
(I) What type of control chart would we use to monitorthis process?
( Circle 1 ) (a) X-bar chart (b) R-chart (c) p-chart (d)c-chart
(II) And why? Since the sample size is given and thedata is collected on regular basis (daily), therefore, p-chart mustbe used.
(III) What are 2-sigma control limits for thisprocess?
(IV) Is the process in control, after you plot andanalyze the Control charts? Why/Why not?
