Programming the statistical procedures from SAS

Equivalence testing for non parametric data in SAS?

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New Contributor
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Equivalence testing for non parametric data in SAS?

Hi!

I have this problem nagging me and I would love some input!

I got this set of data with measurements made with two different manufacturing methods which I would like to compare with each other, and test for equivalence between the methods. My first thought was to conduct a regular TOST with proc ttest but I discarded that idea when i reviewed the data Smiley Happy The data consists of 15 observations for each manufacturing method, and I cannot assume normality due to the distribution of the data. The data is continuous (not ordinal nor nominal).

My question: Is there anybody here that has experience with non-parametric equivalence testing? Preferably in SAS Base (or Enterprise Guide, Excel can work but I rather stay away from it).
I've made some googeling and found some results for a Wilcoxon-Mann-Whitney TOST but no real connection to SAS.

Thank you very much for your time!

/Christian B.
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Posts: 2,655

Re: Equivalence testing for non parametric data in SAS?

I really don't know if you can extend the methods to TOST but I would look at PROC NPAR1WAY for Hodges-Lehman estimates of location shift, and perhaps to PROC MULTTEST for bootstrap resampling of the t-test.

Good luck with this.

Steve Denham
New Contributor
Posts: 2

Re: Equivalence testing for non parametric data in SAS?

Thank you Steve, much appreciated! I will look into this Smiley Happy

/Christian.
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