Answer for a problem based on statistical quality control.
The quality-control inspector examine 200 pieces in a certain operation. The piece is either good or else defective. The record for nine hours is
|
Time
|
No. Checked
|
No. of Defects
|
|
a.m.
|
200
|
0
|
|
a.m.
|
200
|
3
|
|
10a.m.
|
200
|
4
|
|
11a.m.
|
200
|
0
|
|
12. p.m.
|
200
|
5
|
|
|
|
|
|
p.m.
|
200
|
2
|
|
p.m.
|
200
|
0
|
|
3p.m.
|
200
|
1
|
|
4 p.m.
|
200
|
3
|
Construct the p-chart as well as determine if corrective action is needed