Re: iid distribution problem

Posted by David Marso on Sep 14, 2011; 4:52pm
URL: http://spssx-discussion.165.s1.nabble.com/iid-distribution-problem-tp4746052p4803541.html

Without further explication of the experimental design, measurement properties of your variables etc, IMNSHO, it would be rather imprudent to further advise.   Is this your data?  Data someone else wants you to advise on?  If the latter then you might reconsider your role and refer the query to a qualified statistical resource.
----
What are IV1, IV2, IV3?  
1. "properties" of the object?
2. Various conditions in which the objects are rated?
3. What is the nature of this "rating"?
If 1. then the values of these variables would be constant within each object (in your data they are not).
So, how about providing a few details about the experimental design, the metrical properties of the data etc.

drfg2008 wrote

the case seems to be a bit more complicated (at least for me). Any help and/or syntax appreciated.


Problem:

"479 raters score 16 objects. Each rater score (a) the same 16 objects"

this is a shortened version of the data with 6 objects and 2 raters...

caseNo: number of object
DV: dependent variable - has to be explained (object)
IV1: 1st independent variable - has to be tested (object)
IV2: 2nd independent variable - has to be tested (object)
IV3: 3rd independent variable - has to be tested (object)
probandNo:  the number of the proband (rater)
prob_age: age of proband  - has to be tested (rater)
prob_sex: sex of proband (rater) - has to be tested (rater)


probandNo DV IV1 IV2 IV3 caseNo prob_age prob_sex
1000 1 5 4 3 1 42 1
1000 3 4 1 1 2 42 1
1000 4 5 2 4 3 42 1
1000 2 8 4 5 4 42 1
1000 1 7 3 2 5 42 1
1000 1 2 2 2 6 42 1

1001 1 2 2 2 1 32 2
1001 1 7 3 2 2 32 2
1001 2 8 4 5 3 32 2
1001 4 5 2 4 4 32 2
1001 1 5 4 3 5 32 2
1001 3 4 1 1 6 32 2

The underlying question is which of the variables (object: IV1, IV2, IV3 - Rater: prob_age, prob_sex) exerts an influence on DV.


Thanks