1. The Speedway Clinical Laboratory is a scientific blood-testing facility that receivessamples from local hospitals and clinics. The blood samples are passed through severalautomated tests, and the results are printed through a central computer that readsand stores the information about each sample that is tested.
Management is concerned about the quality of the service it provides and wants toestablish quality-control limits as a measure for the quality of its tests. Such managerialpractice is viewed as significant, because incorrect analysis of a sample can leadto a wrong diagnosis by the physician, which in turn might cost the life of a patient.
For this reason, 100 blood samples were collected at random each day after they hadgone through testing. After retesting was performed manually on this sample, theresults were:
|
Day
|
Incorrect Analysis
|
Day
|
Incorrect Analysis
|
Day
|
Incorrect Analysis
|
|
1
|
8
|
8
|
6
|
15
|
2
|
|
2
|
3
|
9
|
3
|
16
|
1
|
|
3
|
1
|
10
|
1
|
17
|
0
|
|
4
|
0
|
11
|
4
|
18
|
6
|
|
5
|
4
|
12
|
6
|
19
|
3
|
|
6
|
2
|
13
|
5
|
20
|
2
|
|
7
|
9
|
14
|
10
|
|
|