Posted by
Simon, Steve, PhD on
Jan 22, 2007; 4:08pm
URL: http://spssx-discussion.165.s1.nabble.com/is-it-correct-if-I-use-Mann-Whitney-U-tp1073199p1073202.html
Omar Farook writes:
> Thanks for information. I have two column, and each column
> contain 4 codes, zero = 0-9, one=10-14, two=15-20, and
> three=21-30. Kindly, the definition of McNemar test talking about two
> related dichotomous variables, and I don't have dichotomous
> variables, my two variables contain 4 categories from 0 to 4 as I have
> mentioned above , also I don't have a "before-and-after" data. So in
> this case could I use McNemar test? By the way, I have the original
> values also. Many thanks. Omar.
There are simple extensions of McNemar's test from a dichotomous outcome
variable to a polytomous variable such as yours. These extensions,
unfortunately, are not available in SPSS. Also, while a before and after
design is one example where you might use McNemar's test, any situation
with paired data could be used.
If you are willing to suffer the loss of information that occurs when
you collapse a four level category into a two level category, then you
can use SPSS. Otherwise, you have to look elsewhere. A brief Google
search did not yield any software that does this, but I'm sure it is out
there somewhere.
You could also analyze the original (uncategorized) values using a
paired t-test.
Best of luck with your research.
Steve Simon,
[hidden email], Standard Disclaimer
My niece (Bachelor's degree in Chemical Engineering
from Carnegie Mellon) is looking for a job. Any help
or leads you can provide would be greatly appreciated.