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I'm not really sure how the subject of this page relates to the test statistic. It seems to me that there is a sufficiently large amount of cross-over for the content of that page to be added to this one, but I'm so far from being an expert that I'm not sure at all. Jimjamjak ( talk) 16:18, 30 May 2012 (UTC) reply

My admittedly incomplete understanding is that sample statistics are't just used for testing. Craniator ( talk) 07:17, 30 December 2015 (UTC) reply

"The average of the heights of all members of the population is not a statistic unless that has somehow also been ascertained (such as by measuring every member of the population)." Doesn't this contradict the definition of a statistic? If you measure the height of each population member, then by definition, isn't the mean a *parameter* as opposed to a statistic (which presumably applies only to a sample)?