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

["George Huang" <cj0623@thu.edu.tw>]

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
> > *
> > *   For searches and help try:
> > *   http://www.stata.com/support/faqs/res/findit.html
> > *   http://www.stata.com/support/statalist/faq
> > *   http://www.ats.ucla.edu/stat/stata/
> *
> *   For searches and help try:
> *   http://www.stata.com/support/faqs/res/findit.html
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/ 
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/