Question

The J H group's assembly unit has decided to use a p-Chart to monitor the proportion of defective castings produced by their production process. The control limits on these charts will be designed to include 97% of the sample proportions when the process is In Control. The quality control manager randomly samples 200 castings at 10 successively selected time periods and counts the number of defective castings in the sample.

Sample   Defects
1...............7
2...............12
3...............8
4...............14
5...............8
6...............9
7...............8
8...............8
9...............12
10..............7

1. What is the Lower Control Limit?

2. What is the Upper Control Limit?

3. What is the z score?

Answer 1

Due to insufficient time ,i will not answer (3)

please separate questions , i will not answer.

thank you !