The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. An 80% confidence inte

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The Trade Magazine Qsr Routinely Checks The Drive Through Service Times Of Fast Food Restaurants An 80 Confidence Inte 1 (409.77 KiB) Viewed 34 times

The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. An 80% confidence interval that results from examining 634 customers in Taco Bell's drive-through has a lower bound of 163.5 seconds and an upper bound of 166.9 seconds. Complete parts (a) through (c). (a) What is the mean service time from the 634 customers? The mean service time from the 634 customers is seconds (Type an integer or a decimal. Do not round.) (b) What is the margin of error for the confidence interval? The margin of error is seconds. (Type an integer or decimal. Do not round.) (c) Interpret the confidence interval. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals. Do not round.) A. One can be There is a B. O C. The mean drive-through service time of Taco Bell is OD. One can be % confident that the mean drive-through service time of Taco Bell is between % probability that the mean drive-through service time of Taco Bell is between seconds % of the time. % confident that the mean drive-through service time of Taco Bell is seconds and seconds and seconds. seconds. seconds.