Answered: The trade magazine QSR routinely checks…

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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Part 1

(a) What is the mean service time from the

692

customers?

The mean service time from the

692

customers is

enter your response here

seconds

(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

seconds.

(Type an integer or a decimal. Do not round.)

Part 3

Select the correct choice below and fill in the answer boxes to complete your choice.

(Type integers or decimals. Do not round.)

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

seconds.

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

seconds.

One can be

enter your response here

confident that the mean drive-through service time of Taco Bell is

enter your response here

seconds.

The mean drive-through service time of Taco Bell is

enter your response here

seconds

enter your response here

of the time.

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.

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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