Bruce,
Good work. Your reported results make sense. A quick run in unpatched
version 19
shows results that do not agree and could be suspect. Those are the numbers
that are being reported by Bridgette. I don't have StatXact on
the machine where I'm at, but would think that its results would agree with
the ones your report. So, this appears to be a problem -- known or unknown
-- in
version 19.
Tony Babinec
[hidden email]-----Original Message-----
From: SPSSX(r) Discussion [mailto:
[hidden email]] On Behalf Of
Bruce Weaver
Sent: Thursday, March 31, 2011 10:08 AM
To:
[hidden email]Subject: Re: exact versus asymptotic p-value under normal circumstances
I just discovered that Bridgette sent some output to the Hotmail account I
use for posting to this list. (Bridgette, as it says in my sig file, I only
use that account for mailing to this list, and check it only occasionally.
If you want to correspond off-list, please use the everyday e-mail address
given in my sig file.)
So, here is syntax to generate her table, and the tests of interest. Notice
that the results I get do not match the ones she sent me.
* Bridgette's data.
data list list / row col kount (3f5.0).
begin data
1 1 11
1 2 16
2 1 14
2 2 35
3 1 8
3 2 21
4 1 23
4 2 27
end data.
var lab
row "Death personality"
col "Age group"
.
val lab
row 1 "Cruel"
2 "Gentle"
3 "Impassive"
4 "Other/variable" /
col 1 "Under 40"
2 "40 plus"
.
weight by kount .
crosstabs row by col / stat = chisqr.
* For those who have the Exact Tests module .
CROSSTABS
/TABLES=row BY col / stat = chisqr
/METHOD=EXACT TIMER(5).
* My results (using v18 with all patches under Windoze XP Professional):
* Pearson: Asymptotic p = .213, exact p = .216 .
* Likelihood ratio: Asymptotic p = .212, exact p = .219 .
* Output Bridgette sent me:
* Pearson: Asymptotic p = .213, exact p = .028 .
* Likelihood ratio: Asymptotic p = .212, exact p = .047 .
Bridgette, what version of SPSS are you using? Have all the available
patches been applied?
Also, regarding Age Group, why group? Do you have the actual ages?
Cheers,
Bruce
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