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Test Value
This is a statistical measure which T-LAB uses to
help in the understanding of the poles of
factors detected through the correspondence analysis.
This measure has two significant properties: a threshold
value (1.96), corresponding to the statistical significance more
commonly used (p. 0.05), and a sign (-/+).
This means that, after sorting the values in an ascending
or descending order (it depends if the values on the positive or
the negative pole are considered), it is possible to quickly single
out the weight of each factor on the factorial axis, and then its
overall meaning.
T-LAB allows a
Test Value table consultation in an interactive way.
The Test Value computation formula is reported
in one of the Bibliography books: Lebart
L., Morineau A., Piron M. (1995).
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