At 09:04 AM 12/10/2007, Dirk Friedrich wrote:
>I've calculated a complex index where the last operation is a
>division between two sums. I get the two sums with descriptives -
>sums. I am doing the final division by hand and then get the index.
>
>My problem is that I can't test any hypothesis about the index
>because I don't get it as a variable
It sounds like your sums are of the values of two different variables
across cases, probably within groups of cases defined by the values
of one or more grouping variables.
If you take your sums with AGGREGATE instead of DESCRIPTIVES, you put
them in your original file (or a new file) as variable values; you
can then calculate their ratio with a COMPUTE, and proceed.
>... for being able to include it in crosstabs for conducting a
>chi-square-test.
Your resulting index will probably have many different values, and
will be more appropriately treated as a continuous than as a discrete
variable. CROSSTABS probably won't serve your purpose.
But that's a story for another day.
-Best wishes,
Richard
>Can anyone help me testing some hypothesis.
>
>
>
>Many thanks,
>
>Dirk
>
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