=========================================================================
Date:         Mon, 24 Jul 2006 08:58:54 +0200
Reply-To:     Marta García-Granero
              <biostatistics@terra.es>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         Marta García-Granero
              <biostatistics@terra.es>
Organization: Asesoría Bioestadística
Subject:      Re: testing about means
In-Reply-To:  <200607221054.k6MAkESl025266@mailgw.cc.uga.edu>
Content-Type: text/plain; charset=ISO-8859-15

Hi Murad,

m> any body please tell me how can i test the difference of means for more
m> than two related samples

You need a Repeated Measures ANOVA (Using the GUI: ANALYZE - GENERAL
LINEAR MODEL - REPEATED MEASURES):

* Sample dataset *.
DATA LIST LIST/placebo terbut teofil terteo(4 F8.1).
BEGIN DATA
3.18 3.27 3.34 3.87
0.80 2.73 2.18 2.28
2.13 2.12 2.13 2.26
1.35 1.92 2.28 2.72
2.10 2.06 2.53 2.73
1.30 2.45 2.35 4.41
3.30 3.10 3.07 3.86
2.93 2.49 2.93 3.25
3.50 3.03 3.32 2.78
0.55 2.26 1.96 2.08
0.33 0.37 1.12 1.05
1.55 2.48 2.23 2.38
2.10 2.12 2.31 2.46
3.49 3.63 3.70 3.63
0.70 0.83 1.57 1.27
2.20 3.06 2.92 2.95
1.35 2.32 2.12 2.65
1.73 2.74 2.68 2.92
4.68 4.54 4.63 4.81
0.83 1.16 2.04 2.70
0.43 0.93 2.70 3.16
END DATA.
VAR LABEL placebo 'FEV(lt) after Placebo'.
VAR LABEL terbut  'FEV(lt) after Terbutaline'.
VAR LABEL teofil  'FEV(lt) after Theophylline'.
VAR LABEL terteo  'FEV(lt) after Terbutaline+Theophylline'.

GLM placebo terbut teofil terteo
  /WSFACTOR = treatmnt 4 Simple(1)
  /MEASURE = FEV
  /PRINT = DESCRIPTIVE
  /WSDESIGN = treatmnt .

HTH,
Dr. Marta García-Granero, PhD