AuthorTopic: Paired Comparisons Test
@2015-04-16 17:12:31
can anyone explain why we use the t-statistic instead of the z- statistic when conducting such tests?
@2015-05-20 11:41:08
Pair comparison test is actually a test for a sample which has value derived from the difference between to dependent sample. When doing paired comparison test, do we know the population variance? Is the sample size > 30? We do not know the population and therefore t-stats is definitely a more conservative test, so that is probably the reason why we choose it over the z-stats.

CFA Discussion Topic: Paired Comparisons Test

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