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Data Analysis and Statistics for Geography, Environmental Science, and Engineering
book

Data Analysis and Statistics for Geography, Environmental Science, and Engineering

by Miguel F. Acevedo
December 2012
Beginner content levelBeginner
557 pages
19h 5m
English
CRC Press
Content preview from Data Analysis and Statistics for Geography, Environmental Science, and Engineering
434 Data Analysis and Statistics for Geography, Environmental Science, and Engineering
where N is a scale factor (e.g., 1,000 or 10,000 depending on the units of population) and x
i
and P
i
are the number of events and population in region i.
13.4.3 Gearys c
The Geary statistic c is a measure of dissimilarity, because it uses squared differences between
values of the variable instead of the product and is divided by 2.
c
wz z
w
z
n
ij
ij
j
n
i
n
ij
j
n
i
n
i
i
n
=
∑∑
∑∑
()
2
2
2
1
(13.10)
This can be rewritten in the more common form
c
nw
zz
wz
ij
ij
j
n
i
n
ij
j
n
i
n
i
i
n
=
−−
∑∑
∑∑
()
()
1
2
2
2
(13.11)
Note that for binary weights (1 or 0) this expression reduces to
c
nw
zz
wz
ij
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Publisher Resources

ISBN: 9781439885017