
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Sections of aluminum sheet metal of various lengths,
used for construction of airplane fuselages, are lined up
on a conveyor belt that moves at a constant speed. A
sample is selected by taking whatever section is passing
in front of a station at five-minute intervals. Explain why
this sample may not be random; that is, it is not an accu-
rate representation of the population of all aluminum
sections.
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