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Date:         Thu, 31 Jan 2008 09:38:05 -0700
Reply-To:     ViAnn Beadle <vab88011@gmail.com>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         ViAnn Beadle <vab88011@gmail.com>
Subject:      Re: Means, averages
Comments: To: Samir Omerovic <samir.omerovic@gfk.ba>
In-Reply-To:  <200801311537.m0VFbeHh031361@linhost2.utic.net.ba>
Content-Type: text/plain; charset="iso-8859-2"

Assuming the responses in the groups are completely independent, get your data into the shape of one response variable and one group variable--your second layout. The recode the group variable into two groups:

Recode g (1=1)(2,3,4=2)into twogroups.

Use any of the univariate analysis of variance procedures such as ANOVA, ONEWAY, UNIANOVA, t-TEST (since you only have 2 groups) to test your hypothesis. All of these procedures will also provide the group means as either default or optional output. You can find details in Help.

-----Original Message----- From: Samir Omerovic [mailto:samir.omerovic@gfk.ba] Sent: Thursday, January 31, 2008 8:50 AM To: 'ViAnn Beadle' Cc: SPSSX-L@LISTSERV.UGA.EDU Subject: RE: Means, averages

Hi,

First of all I need to calculate that mean for all other groups, and then to compare it with group1 (to test hypothesis that there is no difference between group1 and average of all other groups.

Samir

Samir Omerovic Researcher

[Vi sez:] -----Original Message-----

What do you mean by compare? Do you mean to test the hypothesis that there are no differences between groups, between group 1 and all other groups or something else?

-----Original Message----- From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of Samir Omerovic Sent: Thursday, January 31, 2008 3:40 AM To: SPSSX-L@LISTSERV.UGA.EDU Subject: Means, averages

Hi to all,

I have question about average values. I have data that looks like this:

V1 V2 V3 V4

1

3

5

3

3

1

3

4

5

4

5

1

4

4

5

4

2

2

2

These are answers on scale from 1-agree to 5-disagree to certain question. Variables V1, V2, V3, V4 are basically different groups of respondents but all answers are to the same question. It is the same as this one:

Q G

1 1

3 1

5 1

3 1

3 1

1 2

3 2

4 2

5 2

4 2

5 3

1 3

4 3

4 3

5 4

4 4

2 4

2 4

2 4

Q stands for question and G stands for Group.

So now I need to compare means in following way: Group1 vs. average of all other groups. How should I calculate the average of all other groups? Is it simple as making them all Group2 or should I pay attention to some other details?

Hope I wrote it clear enough:)

Samir

Samir Omerovic Researcher ___________________________ GfK BH d.o.o. Skenderija 44 71 000 Sarajevo Bosnia and Herzegovina Phone +387 33 550 300 Fax +387 33 444 226 samir.omerovic@gfk.ba www.gfk.ba Before printing this e-mail, please consider environment protection.

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