The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. An 80%...
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The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. An 80% confidence interval that results from examining 580 customers in Taco Bell's drive-through has a lower bound of 170.8 seconds and an upper bound of 174.6 seconds. Complete parts (a) through (c).(a) What is the mean service time from the 580 customers?
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