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


From   "George Huang" <cj0623@thu.edu.tw>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: how to check the reliability and validity of the data
Date   Sun, 23 Mar 2008 12:26:42 +0800

Dear Dave,

Thanks for your opinion. Actually, 72,878 observations are measured by stopwatches from 2 branches (out of 129 branches). They represent 2,800 activity time of a bank. I would like to know whether the data close to mean (that is, whether these data are representative). However, I don't know how to use stata to get the proper results.



Thank you,



George







----- Original Message ----- From: "David Airey" <david.airey@vanderbilt.edu>
To: <statalist@hsphsun2.harvard.edu>
Sent: Sunday, March 23, 2008 11:29 AM
Subject: Re: st: how to check the reliability and validity of the data



.

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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