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Re: st: Re: determining differences between intercepts after regression


From   Tim Wade <wadetj@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: determining differences between intercepts after regression
Date   Wed, 18 Feb 2009 14:53:14 -0500

Some other references supporting Jeph's statement:

Overlapping confidence intervals or standard error intervals: What do
they mean in terms of
statistical significance? Mark E. Payton, Matthew H. Greenstone, and
Nathaniel Schenker. Journal of Insect Science. 3:34, 2003

RE: "EPIDEMIOLOGY OF SALMONELLOSIS IN CALIFORNIA, 1990–1999:
MORBIDITY, MORTALITY, AND HOSPITALIZATION COSTS" Zuber D. Mulla and
Stephen R. Cole. Letter to the Editor, American Journal of
Epidemiology. 2004 159(1)

Tim


On Wed, Feb 18, 2009 at 2:46 PM, Richard Goldstein
<richgold@ix.netcom.com> wrote:
> a nice description can be found in
>
> Wolfe, R and Hanley, J (1/8/2002), "If we're so different, why do we keep
> overlapping? When 1 plus 1 doesn't make 2", _Canadian Medical Association
> Journal_, 166: 65-66
>
> Martin Weiss wrote:
>>
>> <>
>>
>> Please explain!
>>
>> HTH
>> Martin
>> _______________________
>> ----- Original Message ----- From: "Jeph Herrin" <junk@spandrel.net>
>> To: <statalist@hsphsun2.harvard.edu>
>> Sent: Wednesday, February 18, 2009 8:32 PM
>> Subject: Re: st: Re: determining differences between intercepts after
>> regression
>>
>>
>>> Not quite. If they don't overlap, then yes, they are
>>> different; but if they do overlap, the two intercepts
>>> may still be significantly different at an alpha of 5%.
>>>
>>> Martin Weiss wrote:
>>>>
>>>> <>
>>>>
>>>> See whether their confidence intervals overlap...
>>>>
>>>> HTH
>>>> Martin _______________________
>>>> ----- Original Message ----- From: "Ian C Zink" <izink@rsmas.miami.edu>
>>>> To: <statalist@hsphsun2.harvard.edu>
>>>> Sent: Wednesday, February 18, 2009 7:59 PM
>>>> Subject: st: determining differences between intercepts after regression
>>>>
>>>>
>>>>> Dear Stata List,
>>>>>  I have computed two linear regressions and would like to compare the
>>>>> computed intercepts statistically.  Is there a command or command process
>>>>> that can achieve this?  Thank you for your assistance.
>>>>> Ian
>>>>>
>>>>> --
>>>>> Ian C. Zink
>>>>> Aquaculture Department - Division of Marine Affairs U. of Miami -
>>>>> Rosenstiel School of Marine and Atmospheric Science
>>>>> 4600 Rickenbacker Causeway
>>>>> Miami, FL 33149
>>>>> office: 305-421-4915
>>>>> fax: 305-421-4675
>>>>> email: izink@rsmas.miami.edu
>
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