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st: how to check the reliability and validity of the data


From   "George Huang" <cj0623@thu.edu.tw>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: how to check the reliability and validity of the data
Date   Sun, 23 Mar 2008 11:04:38 +0800

Dear all:

I have a database with 72,878 observations which can be grouped into 2,800 average time of different activities. Therefore, there are 2,800 means and 2,800 S.D. for the activity time. How can I know the reliability and validity of each activity time? Should I use nonparametric statistics or chisquare test?

Thanks a lot for your help!

George Huang
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