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st: friedman test
From
Maria Letizia Bacchi Reggiani <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: friedman test
Date
Wed, 18 Jul 2012 14:41:26 +0000
I ‘ve some problems performing Friedman test on STATA 11.
The STATA command help suggests to xpose, clear data and then to write friedman v?
In this way I obtain :
friedman v?
Friedman = 22.7333
Kendall = 0.8420
P-value = 0.0000
With the form v1-v26 I obtain as result:
friedman v1-v26
Friedman = 59.5731
Kendall = 0.7638
P-value = 0.0000
Performing the same Friedman test with R and with Primer of Biostatistics I obtain a third result:
Friedman = 68.233
P-value = 0.0000
I’m a bit confused, could anybody help me?
Thanks
Letizia Bacchi
PS here you find the data
test1 test2 test3 test4
0 8 72 900
0 2 48 155
0 25 45 350
0 15 35 900
0 170 720 900
100 200 250 2000
0 0 0 750
0 36 150 2300
0 0 0 550
0 30 300 950
0 60 0 950
0 0 36 170
0 0 0 400
0 0 0 850
0 0 0 60
0 50 200 200
0 87 240 240
0 20 500 800
0 0 10 550
0 200 250 450
0 0 400 850
0 0 0 750
0 0 100 750
0 0 350 600
0 0 15 850
0 40 400 480
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