Colding Industries has decided to use a p-Chart with an risk of 1%

1% to monitor the proportion of defective industrial belts produced by their production process. The production manager randomly samples 150

150 industrial belts at 14

14 successively selected time periods and counts the number of defective industrial belts in the sample.

1. What is the upper control limit?
2. What is the lower control limit
3. How are these calculated?

Sample Defects

1 10

2 13

3 11

4 14

5 9

6 10

7 13

8 7

9 12

10 8

11 8

12 10

13 14

14 7