Question: Ben operates a concession stand serving Iced Tea at the Washington County Fair. Ben is the only employee stationed at his stand. Also, suppose that

Ben operates a concession stand serving Iced Tea

Ben operates a concession stand serving Iced Tea at the Washington County Fair. Ben is the only employee stationed at his stand. Also, suppose that the following information holds good. The mean service time is six minutes. Control limits are 3 standard deviations on either side of the mean service time. The standard deviation is 0.5 min. Lower and Upper specification limits for a service time are 5.0 minutes and 7.0 minutes, respectively. Based on the above information, we can best infer that: a. Ben needs to change the lower spec. limit to 4.5 minutes and the upper spec. limit to 7.5 minutes. b. Ben always serves iced tea within the time limit expectations of any customer. c. Ben's service process is NOT a capable one. d. Ben's service process is a capable one. e. b and d are true

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