Dear R-pros
I have a problem, for which usually I would apply a chisq.test or a
fisher.test:
40 objects, each given either a "0" or "1", regarding if this object
later on will be remembered by a subject or not.
7 subjects investigated
means: we have a 2x40 matrix, each cell the number of subjects for who
the object i has been given either "0" or "1" e.g.
objects:
1 1 3 39 40
------------------------------------------
"0" 1 2 2 .. 7 7
"1" 4 4 5 .. 0 0
over all 40 objects, we have 67% of "1" and 33% of "0"
I want to know, if for the 40 objects, the ratio of "0"/"1" differs or
not, i.e. if they have the same distribution.
I cannot use a chisq.test since the expected frequencies are < 5 for the
"0" cells.
Fisher.test seems to run for > 12h on a PIV 1.8GHz...
what do you recommend me to do?
Many thanks
Christoph
--
> recognition
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13] [,14]
[1,] 1 2 2 2 2 3 3 3 3 3 3 3 4 4
[2,] 4 4 5 4 4 3 4 4 4 4 3 4 3 3
[,15] [,16] [,17] [,18] [,19] [,20] [,21] [,22] [,23] [,24] [,25] [,26]
[1,] 4 4 4 4 4 4 5 5 5 5 5 5
[2,] 3 2 3 3 2 3 2 2 2 2 2 2
[,27] [,28] [,29] [,30] [,31] [,32] [,33] [,34] [,35] [,36] [,37] [,38]
[1,] 5 5 5 5 5 6 6 6 6 6 6 6
[2,] 2 2 2 2 2 1 1 1 1 1 1 1
[,39] [,40]
[1,] 7 7
[2,] 0 0
> fisher.test(recognition)
--
Christoph Lehmann <[EMAIL PROTECTED]>
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