Answered: trade magazine routinely checks the…

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015

1st Edition

ISBN:9781680331141

Author:HOUGHTON MIFFLIN HARCOURT

Publisher:HOUGHTON MIFFLIN HARCOURT

Chapter4: Writing Linear Equations

Section: Chapter Questions

Problem 14CR

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Question

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

95%

confidence interval that results from examining

753

customers in one fast-food chain's drive-through has a lower bound of

163.4

seconds and an upper bound of

166.8

seconds. What does this mean?

Choose the correct answer below.

One can be

nothing%

confident that the mean drive-through service time of this fast-food chain is between

nothing

seconds and

nothing

seconds.

The mean drive-through service time of this fast-food chain is

nothing

seconds

nothing%

of the time.

One can be

nothing%

confident that the mean drive-through service time of this fast-food chain is

nothing

seconds.

There is a
probability that the mean drive-through service time of this fast-food chain is between

seconds and

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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