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st: data transformation - need help

From   Andreea Cristiana Didilescu <[email protected]>
To   [email protected]
Subject   st: data transformation - need help
Date   Fri, 15 Jan 2010 09:53:49 +0200


Could anyone help me with some data transformations? I have two
samples (n=45) with skewed distribution.  After using ladder command,
it came out that square transformation would be suitable for both of
them. May I perform a ttest after performing data transformation? How
should I deal with the results? Should I go back to the original data
(e.g. mean difference)? What about the p-value?

Thanks in advance,

Andreea Didilescu, DDS, PhD
Senior Lecturer, Faculty of Dental Medicine
"Carol Davila" UMP, Bucharest, Romania
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