The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. An 80% confidence interval that results from examining 735 customers in Taco Bell's drive-through has a lower bound of 153.2 seconds and an upper bound of 158.2 seconds. Complete parts (a) through (c). (a) What is the mean service time from the 735 customers? The mean service time from the 735 customers is 155.7 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 2.5 seconds. (Type an integer or a 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.) OA. The mean drive-through service time of Taco Bell is OB. There is a OC. One can be On seconds % of the time. % probability that the mean drive-through service time of Taco Bell is between 80% confident that the mean drive-through service time of Taco Bell is between seconds and seconds and seconds. seconds. 4
The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. An 80% confidence interval that results from examining 735 customers in Taco Bell's drive-through has a lower bound of 153.2 seconds and an upper bound of 158.2 seconds. Complete parts (a) through (c). (a) What is the mean service time from the 735 customers? The mean service time from the 735 customers is 155.7 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 2.5 seconds. (Type an integer or a 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.) OA. The mean drive-through service time of Taco Bell is OB. There is a OC. One can be On seconds % of the time. % probability that the mean drive-through service time of Taco Bell is between 80% confident that the mean drive-through service time of Taco Bell is between seconds and seconds and seconds. seconds. 4
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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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 735 customers in Taco Bell's drive-through has a lower bound of 153.2 seconds and an upper bound of 158.2 seconds.
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