Dear ALL,
I have a demonstration data set shown below. The design is that two
observers paid two separate visits to each subject and made a measurement
called q1 for illustration purpose only. I am interested in determining all
the various components of the variance. i.e. between subjects, observer,
visits and the within components as well. I have not used STATA to do this
kind of analysis before so I followed the manual but received an error
message as shown below. What did I get wrong and could someone please show
me the correct way of getting what I want?
Many thanks
Winston Banya
Care of The Elderly Section
Imperial College School of Medicine
Hamersmith Hospital Campus
Du Cane Road
London W12 0NN
Tel: (+44) 0208 383 4284
Fax: (+44) 0208 383 3378
Email: [email protected]
. tabdisp subject visit observer , cell(q1)
------------------------------------
| observer and visit
| ---- 1 --- ---- 2 ---
subject | 1 2 1 2
----------+-------------------------
1 | 7 5 8 9
2 | 6.7 8.9 6.9 7.4
3 | 12.3 11 13 16
4 | 12 11 7.8 9
5 | 6.9 6.4 12 13
6 | 8 6.8 11 13.2
7 | 16 15 10 9.8
8 | 12 11.4 9.9 8.4
9 | 8.2 7.8 7.6 6.9
10 | 7.2 8.5 5.6 6.1
------------------------------------
. anova q1 observer / visit | subject observer*subject , repeated(subject)
could not determine between-subject error term; use bse() option
r(421);
*
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