A trade magazine routinely checks the drive-through service times of fast-food restaurants.An 80% confidence interval that results from examining569 customers in one fast-food chain's drive-through has a lower bound of 171.6 seconds and an upper bound of174.6 seconds. What does this mean? Choose the correct answer below. A.The mean drive-through service time of this fast-food chain is __seconds __ % of the time. B.One can be __%confident that the mean drive-through service time of this fast-food chain is between __ seconds and __seconds. C.There is aenter your response here __%probability that the mean drive-through service time of this fast-food chain is between ___ seconds and ___ seconds. D.One can be ___%confident that the mean drive-through service time of this fast-food chain is __ seconds

given data An 80% confidence interval that results from examining 569 customers in one fast-food chain's drive-through has a lower bound of 171.6 seconds and an upper bound of 174.6 seconds. so 80 % ci for μ is :(171.6,174.6) we have to interprete this ci. as we know ci does not represent probability it represents level of condifidence. answer : B. One can be 80% confident that the mean drive-through service time of this fast-food chain is between 171.6 seconds and 174.6 seconds.

Answered: A trade magazine routinely checks the…

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

A trade magazine routinely checks the drive-through service times of fast-food restaurants.

An 80% confidence interval that results from examining

569 customers in one fast-food chain's drive-through has a lower bound of 171.6 seconds and an upper bound of

174.6 seconds. What does this mean?

Choose the correct answer below.

A.The mean drive-through service time of this fast-food chain is __seconds __ % of the time.

One can be __%
confident that the mean drive-through service time of this fast-food chain is between

__ seconds and __

seconds.

There is a

enter your response here __%

probability that the mean drive-through service time of this fast-food chain is between ___ seconds and ___ seconds.

One can be ___%
confident that the mean drive-through service time of this fast-food chain is __ seconds

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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