notes 39 - Matched Pairs for Means Submitted by gfj100 on...

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Matched Pairs for Means Submitted by gfj100 on Wed, 11/11/2009 - 13:42 Paired Data Simply put, paired data involves taking two measurements on the same subjects, called repeated sampling. Think of studying the effectiveness of a diet plan. You would weigh yourself prior to starting the diet and again following some time on the diet. Depending on how much weight you lost you would determine if the diet was effective. Now do this for several people, not just yourself. What you might be interested in is estimating the true difference of the original weight and the weight lost after a certain period. If the plan were effective you would expect that the estimated confidence interval of these differences would be greater than zero. NOTE: one exception to this repeated sampling on the same subjects is if a pair of subjects are very closely related. For instance, studies involving spouses and twins are often treated as paired data.
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notes 39 - Matched Pairs for Means Submitted by gfj100 on...

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