Npar1way exact Median Test

[Emily]

Can anyone eplain where the p-values come from if the median is equal to 1 or more of the data values in each group?

Thanks alot

[Doc_Duke]

Emily,

I don't understand your question.  It is not unusual for the group median to equal a value in the data.  Where it gets somewhat messier is in that the definition of "median" can vary and that can impact the estimations.  Note that even though these p-values are called "exact" they are not the brute-force computations that we learned in graduate school (those approaches rapidly become prohibitive when the sample size exceeds 10).

Perhaps you could read the documentation referenced in

http://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/viewer.htm#statug_npar1way_a00...

and reframe it.

Doc Muhlbaier

Duke