The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. An 80% confidence interval that results from examining 692 customers in Taco Bell's drive-through has a lower bound of 169.1 seconds and an upper bound of 172.1 seconds. Complete parts (a) through (c).
The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. An 80% confidence interval that results from examining 692 customers in Taco Bell's drive-through has a lower bound of 169.1 seconds and an upper bound of 172.1 seconds. Complete parts (a) through (c).
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants.
An
80
%
confidence interval that results from examining
692
customers in Taco Bell's drive-through has a lower bound of
169.1
seconds and an upper bound of
172.1
Question content area bottom
Part 1
(a) What is the mean service time from the
692
The mean service time from the
692
customers is
enter your response here
(Type an integer or a decimal. Do not round.)
Part 2
(b) What is the margin of error for the confidence interval?
The margin of error is
enter your response here
(Type an integer or a decimal. Do not round.)
Part 3
(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
enter your response here
%
confident that the mean drive-through service time of Taco Bell is between
enter your response here
seconds and
enter your response here
B.
There is a
enter your response here
%
probability that the mean drive-through service time of Taco Bell is between
enter your response here
seconds and
enter your response here
C.
One can be
enter your response here
%
confident that the mean drive-through service time of Taco Bell is
enter your response here
D.
The mean drive-through service time of Taco Bell is
enter your response here
seconds
enter your response here
%
of the time.
Transcribed Image Text:The trade magazine QSR routinely checks the drive-through service times
examining 692 customers in Taco Bell's drive-through has a lower bound of 169.1 seconds and an upper bound of 172.1 seconds. Complete
parts (a) through (c).
fast-food restaurants. An 80% confidence interval that results from
(a) What is the mean service time from the 692 customers?
The mean service time from the 692 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 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.
O B. There is a
% probability that the mean drive-through service time of Taco Bell is between
seconds and
seconds.
O C. One can be
% confident that the mean drive-through service time of Taco Bell is
seconds.
O D. The mean drive-through service time of Taco Bell is
seconds
% of the time.
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