You are the newly appointed assistant administrator at a local hospital, and your first project is to investigate the quality of the patient meals put out by the food-service department. You conducted a 10-day survey by submitting a simple questionnaire to the 400 patients with each meal, asking that they simply check off that the meal was either satisfactory or unsatisfactory. For simplicity in this problem, assume that the response was 1,000 returned questionnaires from the 1,200 meals each day. The results are as follows: Day Number of Unsatisfactory Meals 1-Dec 74 2-Dec 42 3-Dec 64 4-Dec 80 5-Dec 40 6-Dec 50 7-Dec 65 8-Dec 70 9-Dec 40 10-Dec 75 a. Construct an appropriate control chart based on the questionnaire results, using two-sigma control limits. b. What comments can you make about the results of the survey? c. Show breakdown of computation/work.
You are the newly appointed assistant administrator at a local hospital, and your first project is to investigate the quality of the patient meals put out by the food-service department. You conducted a 10-day survey by submitting a simple questionnaire to the 400 patients with each meal, asking that they simply check off that the meal was either satisfactory or unsatisfactory. For simplicity in this problem, assume that the response was 1,000 returned questionnaires from the 1,200 meals each day. The results are as follows:
| Day | Number of Unsatisfactory Meals |
| 1-Dec | 74 |
| 2-Dec | 42 |
| 3-Dec | 64 |
| 4-Dec | 80 |
| 5-Dec | 40 |
| 6-Dec | 50 |
| 7-Dec | 65 |
| 8-Dec | 70 |
| 9-Dec | 40 |
| 10-Dec | 75 |
a. Construct an appropriate control chart based on the questionnaire results, using two-sigma control limits.
b. What comments can you make about the results of the survey?
c. Show breakdown of computation/work.
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