Date: Wed, 21 Sep 2005 12:05:31 -0400
Reply-To: "Zdaniuk, Bozena" <BZdaniuk@ucsur.pitt.edu>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: "Zdaniuk, Bozena" <BZdaniuk@ucsur.pitt.edu>
Subject: standard error of an F test
Content-Type: text/plain; charset="iso-8859-1"
Hello, could someone tell me what is a standard error of an F-test of ANOVA? Is it a square root of Mean Square over N? And can I find it somewhere on the SPSS output or do I need to calculate it by hand?
Bozena
Bozena Zdaniuk, Ph.D.
University of Pittsburgh
UCSUR, 6th Fl.
121 University Place
Pittsburgh, PA 15260
Ph.: 412-624-5736
Fax: 412-624-4810
email: bozena@pitt.edu
-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of Karl Koch
Sent: Wednesday, September 21, 2005 11:42 AM
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: Re: Regresssion Plot in SPSS
Hello,
I have now the coefficients table that contains unstandardized coefficients
and standardized coefficients. It looks like this:
----------------------------------------------------------------
Model Unstd. Coeff. Std. Coeff. t Sig.
B Std. Error Beta
-----------------------------------------------------------------
1(Constant) 4.195 .070 58.971 .000
A -.779 .042 -.319 -18.278 .000
B -.028 .046 -.010 -.618 .534
C -1.635 .064 -.442 -25.354 .000
-----------------------------------------------------------------
Now, I have one question. In regression theory, the linear regression
equation (for three IVs) is defined as:
Y = a + b1*X1 + b2*X2 + b3*X3 + e
where a is a constant (distance on the Y axis) and b1, b2, b3 the paramters
and e the error variance (which is fixed but random).
Given the fact that I have only two paramters being significant, is this the
correct equation?
Y = 4.195 - 0.319 * A - 0.442 * C + e
What would be e in this case? I have standard erros for each parameter...
Karl
>
> Hi Karl,
> I don't know whether this is the optimal way but the method I use has two
> steps
> 1) For the regression line use the code
>
> CURVEFIT /VARIABLES=dep_var WITH indep_var
>
> /CONSTANT
>
> /MODEL=LINEAR
>
> /PLOT FIT.
> 2) For getting the regression equation use
>
> REGRESSION
>
> /MISSING LISTWISE
>
> /STATISTICS COEFF OUTS R ANOVA
>
> /CRITERIA=PIN(.05) POUT(.10)
>
> /NOORIGIN
>
> /DEPENDENT dep_var
>
> /METHOD=ENTER indep_var .
> Hope this helps.
> Deepak
>
> On 9/21/05, Karl Koch <TheRanger@gmx.net> wrote:
> >
> > Hi all,
> >
> > how can I draw a regression diagram with the independent variable on the
> X
> > axis and the dependent variable on the Y axis in a plot together with
> the
> > regression equation as a line ?
> >
> > Karl
> >
> > --
> > GMX DSL = Maximale Leistung zum minimalen Preis!
> > 2000 MB nur 2,99, Flatrate ab 4,99 Euro/Monat:
> > http://www.gmx.net/de/go/dsl
> >
>
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