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Re: st: mean tests an fweight

From   Svend Juul <SJ@SOCI.AU.DK>
To   <>
Subject   Re: st: mean tests an fweight
Date   Mon, 6 Oct 2008 08:54:59 +0200

Leonor wrote:

Im comparing the mean of a sample by group, this is, comparing the
mean of the income earned for males and females. Im using the Stata -
ttest - command, but im a bit confused because this command doesnt
allows using weights (fweights) and I think that this affects the
results, doesnt it?
Do you know another way to compare the means of the sample using weights?


You don't tell us what kind of data you have. If you have summary 
data with N, mean, and SD for each groups, you can use -ttesti-. 
If you have a dataset where an observation may represent several 
individuals (the number defined by -n-), you could

    expand n

before -ttest-.

Hope this helps


Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Vennelyst Boulevard 6
DK-8000  Aarhus C, Denmark
Phone:  +45 8942 6090
Home:   +45 8693 7796

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