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

[David Airey <david.airey@vanderbilt.edu>]

.

I will bet that others will also say you have not provide enough  
information to give a good answer. What do you mean be reliability and  
validity, exactly?

-Dave

On Mar 22, 2008, at 10:04 PM, George Huang wrote:

> 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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