Assignment:
Problem:
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
|
Number of Defective Item in the sample
|
|
1
|
15
|
2
|
|
2
|
15
|
0
|
|
3
|
15
|
3
|
|
4
|
15
|
1
|
|
5
|
15
|
0
|
|
6
|
15
|
3
|
|
7
|
15
|
1
|
|
8
|
15
|
0
|
|
9
|
15
|
0
|
|
10
|
15
|
0
|
a. Determine the p, Sp, UCL and LCL for a p-chart of 95 percent confidence (1.96 standard deviations).
b. What comments can you make about the process? Process is in statistical control Process is out of statistical control.