Houston North Hospital is trying to improve its image by providing a positive ex

Question

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 150-patient sample of the survey results over the past 7 days yielded the following data: No. of Unsatisfied Patients Sample Size 150 150 150 150 150 150 150 Day 24 10 26 15 The control limits to include 99.73% of the random variation in meal satisfaction are UCLp = [ ] (ontor your response as a number between 0 and 1, rounded to three docimal places).

Explanation / Answer

here sample proportion p =(22+24+6+17+10+26+15)/(7*150) =0.1143

for n=150 ; std error =(p(1-p)/n)1/2 =0.026

therefore UCLp =p+ 3*std error =0.192

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