



-
Gamma is
P(concordant) - P(discordant), ignoring comparisons
that are tied. Unfortunately, this often excludes a
number of pairwise comparisons.
-
Somer's d is
a modification of gamma that accounts for comparisons
that are tied on one variable. Somer's d decreases
with respect to gamma as the number of comparisons
tied on one variable increases.
-
Tau-b also
accounts for comparisons tied on one variable but
does not have a simple interpretation. It decreases
with respect to gamma as the number of comparisons
tied on one variable increases.
-
Tau-c also
accounts for comparisons tied on one variable and
does not have a simple interpretation. Tau-c
may be preferable to tau-b when the numbers of
categories in the row and column variables are not
equal.
The approximate significance value of each measure is equal to 0.001.
Since this is less than 0.05, you can conclude there is a statistically
significant relationship between Shopping frequency and
Overall satisfaction.
However, the value of each measure is less than 0.150, so while the
relationship is different from 0, it is still rather weak.
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