Bruno FACON
Universit� Charles De Gaulle - Lille III
Institut Universitaire de Technologie "B"
35 rue Sainte Barbe
B.P. 460
59208 TOURCOING CEDEX
FRANCE
E-Mail : [EMAIL PROTECTED]
[EMAIL PROTECTED]
July 1, 2001
Dear Sir,
I work in the area of intelligence differentiation. I would like to know
how to use the khi2 statistic to determine whether the number of
statistically different correlations between two groups is due or not to
random variations. In particular I would like to know how to determine
the expected numbers of statistically different correlations due to
�chance�.
Let me take an example. Suppose I compare two correlations matrices of
45 coefficients obtained from two independent groups (A and B). If there
is no true difference between the two matrices, the number of
statistically different correlations should be equal to 1.25 in favor of
group A and equal to 1.25 in favor of group B (in case of alpha = .05).
Consequently, the expected number of nonsignificant differences should
be 42.75. Is my reasoning correct?
Many thanks for your response.
Sincerely
B. Facon
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