Answered: Wire rope has many applications,…

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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Wire rope has many applications, especially in hoisting and suspension.
The fatigue limit, measured in MPa, of wire rope was collected for 15
specimens each from three different manufacturers of similar wire rope
diameters, as follows.
(Image)
a. Compare mean fatigue limits of the three manufacturers. Do the same for median
fatigue limits. What do each suggest about the choice of manufacturer? If the two
measures of central tendency suggest different choices, what does the difference
suggest?
b. Construct boxplots for each manufacturer using the built-in function in Excel. What
extra information do you now have relative to part a? What conclusion do you draw
about the difference in manufacturers with this extra information?

Manufacturer 1
Manufacturer 2
Manufacturer 3
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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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