see attached
Ten samples of 15 parts each were taken from an ongoing process to establish a p-chart for control. The samples and the number of defectives in each are shown in the following table.
Sample |
n |
# of defective items in sample |
1 |
15 |
3 |
2 |
15 |
1 |
3 |
15 |
1 |
4 |
15 |
1 |
5 |
15 |
0 |
6 |
15 |
2 |
7 |
15 |
0 |
8 |
15 |
3 |
9 |
15 |
1 |
10 |
15 |
3 |
If Z=1.96, what is the Upper Control Limit for this chart?                                                                                     Â
A blanket manufacturer buys cloth by the 100-yard roll from a supplier. For setting up a control chart to manage the irregularities (e.g., loose threads and tears), the following data were collected from a sample provided by the supplier.
Â
Sample |
Irregularities |
1 |
3 |
2 |
5 |
3 |
2 |
4 |
6 |
5 |
5 |
6 |
4 |
7 |
6 |
8 |
3 |
9 |
4 |
10 |
5 |
If Z=2 what is the Lower Control Limit for this chart?
Formulas: Quiz 3
1