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Re: weights for ttest [message #1687 is a reply to message #1685]

Thu, 27 March 2014 16:40

Reduced-For(u)m
Messages: 292
Registered: March 2013

Senior Member

Thanks for that Liz/Shea.

I've always needed a reason to check the equivalence of these two methods using DHS data, so I did a quick comparison of changes in HAZ over time in Bangladesh as a test case. Let me just confirm that both of these methods generate the same point estimates, and very similar standard errors (probably just rounding differences, and/or something about my specification of strata/psu across survey rounds - but the regression form generated slightly larger se's).

I would add that the regression version took me like 1/10th the time, but that was because retrieving the variance estimates from "svy: mean" took me a minute as they are returned in a matrix.

So point is - Fay: they both work, and statistical theory is vindicated!

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[Message index]

		weights for ttest By: MissFay on Wed, 26 March 2014 17:08
		Re: weights for ttest By: Reduced-For(u)m on Wed, 26 March 2014 17:59
		Re: weights for ttest By: Liz-DHS on Thu, 27 March 2014 14:56
		Re: weights for ttest By: Reduced-For(u)m on Thu, 27 March 2014 16:40
		Re: weights for ttest By: Sarah B on Tue, 14 April 2015 14:45

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