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Date:         Tue, 19 Dec 2006 09:52:01 +0100
Reply-To:     =?windows-1257?Q?Samir_Omerovi=E3?= <samir.omerovic@gfk.ba>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         =?windows-1257?Q?Samir_Omerovi=E3?= <samir.omerovic@gfk.ba>
Subject:      Re: Significant difference - Means
Comments: To: Spousta Jan <JSpousta@CSAS.CZ>
In-Reply-To:  <E08B564BAA29FE4F8EC8BAF42FE0A01F01055533@bubsex02.cen.csin.cz>
Content-Type: text/plain; charset="windows-1257"

Hi Jan,

I think that I can not use Independent samples T-test since I have dependent variables. Those 500 students are the part of 1000 respondents. I do not want to test students vs. non-students but students vs. all (non-students + students).

Samir

-----Original Message----- From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of Spousta Jan Sent: Tuesday, December 19, 2006 9:31 AM To: SPSSX-L@LISTSERV.UGA.EDU Subject: Re: Significant difference - Means

I am very sorry, but this would be wrong in this case. Because the number 3.5 is not a constant known with (almost) no error, but a sample statistics based on the 1000 respondents. Therefore the Independent-samples T-test should be used as I've written in my previous posting.

Jan

-----Original Message----- From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of John Antonakis Sent: Tuesday, December 19, 2006 9:25 AM To: SPSSX-L@LISTSERV.UGA.EDU Subject: Re: Significant difference - Means

If you wiysh to test the mean of a particular group against the mean of a particular value then you can use the single-sample t-test (from the Menus Analyze/Compare Means/One sample t-test), or use the syntax:

T-TEST /TESTVAL = 3.5 /MISSING = ANALYSIS /VARIABLES = VAR00001 /CRITERIA = CI(.95) .

HTH, J.

At 09:05 19.12.2006 +0100, =?iso-8859-2?Q?Samir_Omerovi=E6?= wrote: >Hi to all, > > > >My first question is what test should I use if I need to assess the >significance of the mean of some subgroup in comparison the mean of the >total population. For example I have 1000 respondents that answered a >question on 7-point scale. Their mean/average is 3,5. I have 500 >students among those 1000 respondents with mean/average 2,9. I want to >know if these values are significantly different. >What test should I use in SPSS? > > > >Thanks to all in advance. > > > >Samir > > > >GfK BH > >Centar za istrazivanje trzista i javnog mnijenja d.o.o. > > > >Samir Omeroviż > >Researcher > > > >71 000 Sarajevo, Skenderija 44 > >Bosna i Hercegovina > > > > > >Tel: +387 33 550 300 > >Fax: +387 33 444 226 > >www.gfk.ba > >www.gfk.com > > > > > > > >----------------------------------------- > >This e-mail (and any attachment/s) contains confidential and/or >privileged information. If you are not the intended recipient (or have >received this e-mail in error) please notify the sender immediately >and destroy this e-mail. Any unauthorized copying, disclosure or >distribution of the material in this e-mail is strictly forbidden. > >Ova e-poruka sadrzi povjerljive i/ili povlastene podatke. Ako niste >osoba naznacena kao primalac molimo odmah upozoriti posiljaoca i >unistiti primljenu e-poruku. >Neautorizirano kopiranje, >objavljivanje ili distribucija sadrzaja e-poruke striktno je zabranjeno. > >--------------------------------------- > >

___________________________________

Prof. John Antonakis Faculty of Management and Economics University of Lausanne Internef #527 CH-1015 Lausanne-Dorigny Switzerland

Tel: ++41 (0)21 692-3438 Fax: ++41 (0)21 692-3305

http://www.hec.unil.ch/jantonakis ___________________________________


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