Answered: The value of Young’s modulus (GPa) was…

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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The value of Young’s modulus (GPa) was determined for
cast plates consisting of certain intermetallic substrates,
resulting in the following sample observations (“Strength
and Modulus of a Molybdenum-Coated Ti-25Al-
10Nb-3U-1Mo Intermetallic,” J. of Materials Engr.
and Performance, 1997: 46–50):
116.4 115.9 114.6 115.2 115.8
a. Calculate x and the deviations from the mean.
b. Use the deviations calculated in part (a) to obtain the
sample variance and the sample standard deviation.
c. Calculate s2 by using the computational formula for
the numerator Sxx.
d. Subtract 100 from each observation to obtain a sample
of transformed values. Now calculate the sample
variance of these transformed values, and compare it
to s2 for the original data.

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