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Hi listers,
The following questions are related so I hope this post does not
contravene the protocol of one topic per post. If so, let me know and in
future I will break the questions up.
a) My study involves 245 cases. When I try to compute FET for tables
(none larger than 4 x 4), it sometimes fails for lack of memory resources,
or for lack of time. I have 1 gig of RAM, 1.15 ghz processor, 6.5 gigs
free space, SPSS workspace set to 4096 kb (same as swap file) currently.
How much memory is enough? How much time is enough, I am using 10
minutes...is it possible to override the default time limit?
b) Is there any macro that will instruct SPSS to use Monte Carlo
simulation if the requested Fisherâs Exact tests times out or fails for
lack of memory?
c) When I select Monte Carlo the dialogue box says it will use
Fisherâs when resources permit. But it never seems to do this...(even
when I know the computation is successful when I select Fisherâs instead
of MC). I set the MC specs to 99.9 and 50,000...it computes very
quickly...so Iâm not sure why the FET doesnât.
d) When I ask for MC, I usually get a value for Fisherâs, but no
significance stat. There is a significance value in the MC column, and a
CI. What is the best way to report this (APA if possible)?
e) With exact tests installed, is there a list of tests/procedures
that use them?
Much thanks as always,
Glenys Lafrance
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