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st: Stat advice for McNemar's test


From   "Data Analytics Corp." <dataanalytics@earthlink.net>
To   Stata Listserve <statalist@hsphsun2.harvard.edu>
Subject   st: Stat advice for McNemar's test
Date   Tue, 21 Oct 2008 09:06:28 -0400

Hi,

I have a client who did a basic before-after taste test for two products. For each, the consumers were asked if the like the product on an initial taste and then again after a period of time. Each consumer tested each product. For one product, a McNemar's Test can be used to see if the marginals are the same - to see if there's a difference in liking from the initial to later taste. But what about both products? The client wants to know about interactions between the products and time? Any advice?

Thanks,

Walt






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Walter R. Paczkowski, Ph.D.
Data Analytics Corp.
44 Hamilton Lane
Plainsboro, NJ 08536
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(V) 609-936-8999
(F) 609-936-3733
dataanalytics@earthlink.net
www.dataanalyticscorp.com

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