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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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
Transcribed Image Text:What is the problem with using the "mean difference
from the mean" as a measure of variability?
a) The mean of the differences from the mean is an
underestimate of the variability of the yi around the
mean.
b) The value of the mean difference from the mean
depends on whether you sum (yi - mean) or (mean -
yi) over all the values.
c) The mean of the differences from the mean is
always zero.
d) The mean of the differences from the mean is an
overestimate of the variability of the yi around the
mean.
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