Answered: A pizza restaurant in a small college…

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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A pizza restaurant in a small college town finds that the average delivery time (assuming no unusual problems or delays) for a pizza to be µ = 28.8 minutes with a standard deviation of σ = 6 minutes. Assume the distribution of all delivery times is normal.

James does not know any of the above information about delivery times. He resolves to take a sample of 64 delivery times. James will then calculate the mean of the 64 sampled delivery times (represented as X¯X¯ ) and use this as an estimate of the mean population delivery time µ (which he does not know, but you do, it is 28.8 minutes).

Consider all the potential sample means (X¯X¯) James could get. Determine the mean of all the potential sample means. μX=μX=

Do Not Round.

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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