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<<<-------- Kenneth Chung-------->>>
> Tie strength in my study is measured by:
> - closeness (4 point scale from very close to distant) and
> - frequency of contact (5 point scale ranging from daily to less often),
> although data on other variables such as 'time known' and 'relationship
> type' is also available.
> 1. use the average strength of ties for an ego (ie. sum the values of each
> tie from ego to alter and divide by count of ties). In this case, the
> of each tie may be:
> (i) the average of closeness and frequency values, or
> (ii) the product of closeness and frequency values
Since your tie strength is measured on ordinal scale the
average and product are not good measures for the mean
value - the right measure is median. See for example
F.S. Roberts: Discrete Mathematical Models. pp. 491-497.
If your measurements can be seen as estimates of logarithms
of real values measured on rational scale then you
can use the average (arithmetic mean) - logarithm of geometric
mean (a good measure of mean for rational scale) turns into
average of logarithms.
Vladimir Batagelj, University of Ljubljana, Department of Mathematics
Jadranska 19, PO Box 2964, 1111 Ljubljana, Slovenia
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