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RE: st: Missing F value in regression output.


From   "Gupta, Sumedha" <sugupta@iupui.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Missing F value in regression output.
Date   Wed, 29 Jun 2011 19:47:57 +0000

Thank you for your prompt reply and apologies for omitting the syntax. I had typed:

eststo BMImsw:  svy, subpop(pop2w): reg logYw4 /*incW4*/ BMI currwkW4 MDcurrwkW4 tenW4 MDtenW4  malew1 ///
blackhw1 hisphw1 raceother ageW4 agesqW4 totchild MDtotchild peduyw1 MDpeduyw1 eduyw4 /*lowbrthwt*/ exercisew4 ///
 hlthinW4 vocabStdW1 region1 region2 region3 depressw4 marriedw4  

Many thanks,
Sumedha.


________________________________________
From: owner-statalist@hsphsun2.harvard.edu [owner-statalist@hsphsun2.harvard.edu] on behalf of Nick Cox [njcoxstata@gmail.com]
Sent: Wednesday, June 29, 2011 2:58 PM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: Missing F value in regression output.

You did not specify the syntax you typed, presumably some variant of
-svy:-. -svy- experts are no fonder of guessing games than anyone
else!

Nick

On Wed, Jun 29, 2011 at 7:32 PM, Gupta, Sumedha <sugupta@iupui.edu> wrote:

> I will really appreciate your help in the following:
>
> For a regression I am running the output begins as follows:
>
> Number of strata   =         4                  Number of obs      =      3395
> Number of PSUs     =       132                Population size    = 7364711.9
>                                                        Subpop. no. of obs =      3395
>                                                Subpop. size       = 7364711.9
>                                                Design df          =       128
>                                                F(  20,    109)    =         .
>                                                Prob > F           =         .
>                                                R-squared          =    0.1775
>
>
> I am not sure why the F(20,109) stat is missing? Also what does this imply for my results?

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