Abstract
(1) If the ratio of two absolute measurements on the same or different organs be taken it is convenient to term this ratio an
index
. If
u
=
f
1
(
x
,
y
) and
v
=
f
2
(
x
,
y
) be two functions of the three variables
x, y, z
, and these variables be selected at random so that there exists no correlation between
x, y
,
y, z
, or
z, x
, there will still be found to exist correlation between
u
and
v
. Thus a real danger arises when a statistical biologist attribntes the correlation between two functions like
u
and
v
to
organic
relationship. The particular case that is likely to occur is when
u
and
v
are indices with the same denominator for the correlation of indices seems at first sight a very plausible measure of organic correlation.
Subject
General Earth and Planetary Sciences,General Environmental Science
Cited by
603 articles.
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