Re: MANOVA design

monopsony wrote:
Bruce,

Thank-you for your reply. I should have given more infomation in my
original post. There are three dependent variables, hence my decision
to use MANOVA.

I guess what I was trying to ask was how to test the null hypothesis
of: "the relationship between the active variables and the dependent
variables is significant for both products". If I include the 2
products in the MANOVA, to make it a 2x2x2(products) from the original
2x2 design, then a non-significant result for the products cell would
be enough to support the null hypothesis that the relationships are the
same for both products.

Brent.


You need to be looking at interactions involving Product.

The null hypothesis for the A x Product interaction is that the (main) effect of A is the same for both products.

The null hypothesis for the B x Product interaction is that the (main) effect of B is the same for both products.

The null hypothesis for the A x B x Product interaction is that the nature of the A x B interaction is the same for both products.

--
Bruce Weaver
bweaver@xxxxxxxxxxxx
www.angelfire.com/wv/bwhomedir
.