```========================================================================= Date: Mon, 24 Jul 2006 08:09:12 -0500 Reply-To: "Beadle, ViAnn" Sender: "SPSSX(r) Discussion" From: "Beadle, ViAnn" Subject: Re: weighted numbers Comments: To: Albert-jan Roskam Content-Type: text/plain; charset="us-ascii" Weights don't apply to AGGREGATE; only to statistical procedures. -----Original Message----- From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of Albert-jan Roskam Sent: Monday, July 24, 2006 7:52 AM To: SPSSX-L@LISTSERV.UGA.EDU Subject: weighted numbers Dear all, I want to calculate the relative proportions of people within educational categories, stratified by sex and country. I use a standardized weight that corrects for sample selection bias. Could anybody tell me why-oh-why the two methods listed below yield (slightly) different results? The N function of the aggregate counts the weighed number of cases within the break group. So why are the AGGREGATE results identical to the output I get using SUMMARIZE with an UNweighted sample? Am I missing something? Thanks a lot in advance! Albert-Jan weight by w_plus. ** Method 1. compute dummy = 1. summarize tables = dummy by sex by country3 by educat / cells = npct (educat). ** Method 2. aggregate outfile = "d:\temp\tmp.sav" / break = sex country3 educat / n = n. aggregate outfile = * / break = sex country3 / n_tot = n. match files table = * / file = "d:\temp\tmp.sav" / by = sex country3. compute pct = (n / n_tot ) * 100. exe. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around ```

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