(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.) O A. One can be % confident that the mean drive-through service time of Taco Bell is between seconds and seconds. O B. The mean drive-through service time of Taco Bell is seconds % of the time. O C. There is a % probability that the mean drive-through service time of Taco Bell is between seconds and seconds. O D. One can be % confident that the mean drive-through service time of Taco Bell is seconds.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. A 95% confidence interval that results from
examining 750 customers in Taco Bell's drive-through has a lower bound of 171.5 seconds and an upper bound of 176.1 seconds. Complete parts
(a) through (c).
(a) What is the mean service time from the 750 customers?
The mean service time from the 750 customers is 173.8 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 2.3 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.)
O A. One can be
% confident that the mean drive-through service time of Taco Bell is between
seconds and
seconds.
B. The mean drive-through service time of Taco Bell is
seconds
% of the time.
C. There is a
% probability that the mean drive-through service time of Taco Bell is between
seconds and
seconds.
D. One can be
% confident that the mean drive-through service time of Taco Bell is
seconds.
Transcribed Image Text:The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. A 95% confidence interval that results from examining 750 customers in Taco Bell's drive-through has a lower bound of 171.5 seconds and an upper bound of 176.1 seconds. Complete parts (a) through (c). (a) What is the mean service time from the 750 customers? The mean service time from the 750 customers is 173.8 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 2.3 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.) O A. One can be % confident that the mean drive-through service time of Taco Bell is between seconds and seconds. B. The mean drive-through service time of Taco Bell is seconds % of the time. C. There is a % probability that the mean drive-through service time of Taco Bell is between seconds and seconds. D. One can be % confident that the mean drive-through service time of Taco Bell is seconds.
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