topic Re: Generalization Friedman's test in SAS (PROC freq) in Statistical Procedures

Generalization Friedman's test in SAS (PROC freq)

RichardPost — Fri, 12 Jan 2018 20:57:58 GMT

Dear all,

To execute a Friedman's test in SAS, one can use proc freq as explained in the following link:

https://support.sas.com/documentation/cdl/en/statug/63033/HTML/default/viewer.htm#statug_freq_sect033.htm

In addition it is stated that:

‘If there are multiple subjects per treatment in each block, the ANOVA CMH statistic is a generalization of Friedman’s test.’

I am really wondering which generalization is referred to here? Since the procedure seems to perform fine in a setting with non-equal repeats per treatment in different blocks the only test I am familiar that could fit this framework is the Benard and Van Elteren's test (1953), see e.g. (http://www.sciencedirect.com/science/article/pii/0010480977900040).

Kind regards,

Richard Post MSc

Re: Generalization Friedman's test in SAS (PROC freq)

Ksharp — Sat, 13 Jan 2018 10:24:18 GMT

Maybe that means non-parameter ANOVA .

proc freq;

table a*b/cmh2 cmb score=row ;

run;

Re: Generalization Friedman's test in SAS (PROC freq)

StatDave — Fri, 19 Jan 2018 14:45:57 GMT

The Cochran-Mantel-Haenszel method is a broad, general method for testing in stratified two-way tables. The method includes such things as McNemar's test, Wilcoxon rank sum test, and Cochran's Q, as well as Friedman's test. For more on the method, see the Agresti reference in the References section of the PROC FREQ documentation