Houston North Hospital is trying to improve its image by providing a positive experience for its patients and their relatives. Part of the​ "image" program involves providing​ tasty, inviting patient meals that are also healthful. A questionnaire accompanies each meal​ served, asking the​ patient, among other​ things, whether he or she is satisfied or unsatisfied with the meal. A 100​-patient sample of the survey results over the past 7 days yielded the following​ data:
The upper and lower control limits to include​ 99.73% of the random variation in meal satisfaction​ are: