A manager of a McDonalds franchise has developed a service criterion whereby a dinner order is considered
Question:
A manager of a McDonald’s franchise has developed a service criterion whereby a dinner order is considered to be defective if it takes longer than 180 seconds. Listed below are numbers of such defects among groups of 50 different customers on each of several consecutive days (based on Data Set 36 “Fast Food” in Appendix B). Construct an appropriate control chart and determine whether the process is within statistical control. What should the manager conclude from the result?
Transcribed Image Text:
Data Set 36: Fast Food MCDONALDS LUNCH 107 139 197 209 281 MCDONALDS DINNER 84 121 119 146 266 BURGER KING LUNCH 116 131 147 120 126 BURGER KING DINNER 101 126 153 116 175 WENDYS LUNCH 466 387 368 219 177 WENDYS DINNER 56 82 120 116 121 DUNKIN DONUTS LUNCH 86 201 179 131 126 DUNKIN DONUTS DINNER 181 50 177 107 68
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