Assignment:
Q: The following data shows the packages collected for delivery for ten days and the proportion of packages received not delivered to the customers at the expected time.
Day Collected Packages Not delivered Proportion
1 136 4
2 153 6
3 127 2
4 157 7
5 144 5
6 122 5
7 154 6
8 132 3
9 160 8
10 142 7
A. Construct the proportions charts for this process.
B. Is the mail package delivery out of control?
[use Megastat, quality control process charts or use Phstat, p control charts.