You are the newly appointed assistant administrator at a local hospital, and your first project is...

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:

	NUMBER OF UNSATISFACTORY MEALS	SAMPLE SIZE
December 1	77	1,000
December 2	74	1,000
December 3	62	1,000
December 4	70	1,000
December 5	82	1,000
December 6	50	1,000
December 7	50	1,000
December 8	42	1,000
December 9	54	1,000
December 10	58	1,000
	[s23)]	10,000

a. Determine the p⎯⎯p¯ , S_p, UCL and LCL based on the questionnaire results, using a confidence interval of 95.5 percent, which is two standard deviations. (Round your answers to 4 decimal places.)


p⎯⎯p¯
S_p
UCL
LCL

Solutions

Expert Solution

Conclusion: the process is in control, as all the proportion values are within the control limits.

(Please like the answer it will encourage me, do comment if any correction required before disliking.)

keosha answered 1 month ago

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