paired t test

Tuesday, November 18th, 2014

Wikipedia says:

“….

Paired samples t-tests typically consist of a sample of matched pairs of similar units, or one group of units that has been tested twice (a “repeated measures” t-test).

A typical example of the repeated measures t-test would be where subjects are tested prior to a treatment, say for high blood pressure, and the same subjects are tested again after treatment with a blood-pressure lowering medication. By comparing the same patient’s numbers before and after treatment, we are effectively using each patient as their own control.

…”

http://en.wikipedia.org/wiki/Student%27s_t-test#Paired_samples

 

http://www.stats.gla.ac.uk/glossary/?q=node/355

http://www.gla.ac.uk/sums/users/jdbmcdonald/PrePost_TTest/pairedt1.html


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