Bob is selling 80 pound bags of fertilizer. The machine he uses have a standard deviation of fill equal to 1.5 pounds. In the last production run of 150 bags, he checked 15. The results are below:
Bag Weight
1 82
2 80
3 81
4 77
5 81
6 85
7 82
8 81
9 81
10 84
11 82
12 85
13 84
14 88
15 80
Make a control chart to determine what signals, if any, indicate that the process is out of control. Then list the days the signal occurredand the type of signal (I,II,III)