Construct an appropriate control chart

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Reference no: EM131388604

A major airline surveys passengers to monitor the satisfaction level of its customers. Even though the airline uses a five-point Likert scale (5: outstanding service; 4: good; 3: average; 2: below average; 1: poor), it wants to monitor the proportion that consider the service level as either outstanding or good.

Table shows the number of passengers responding to the survey and the number that consider the service as either outstanding or good. Construct an appropriate control chart and comment on the service level of the airline.

Table : Passenger Satisfaction Survey in Airline
Week	Number Responded	Number Checking "Outstanding" or "Good"	Week	Number Responded	Number Checking "Outstanding" or "Good"
1	80	65	14	135	105
2	110	80	15	125	90
3	250	210	16	150	118
4	150	130	17	100	82
5	90	70	18	110	75
6	100	85	19	85	64
7	140	108	20	140	114
8	220	202	21	165	122
9	200	184	22	185	148
10	180	140	23	130	105
11	70	55	24	125	114
12	95	70	25	120	105
13	115	82

Reference no: EM131388604

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