Date:         Wed, 18 Dec 2002 12:06:11 -0800
Reply-To:     Dave Andrae <daandrae@YAHOO.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Dave Andrae <daandrae@YAHOO.COM>
Subject:      Re: help on power analysis
Comments: To: "Lai L." <laihere@yahoo.com>
In-Reply-To:  <20021217194020.11774.qmail@web14105.mail.yahoo.com>
Content-Type: text/plain; charset=us-ascii

LL,

Try

Statistical Power Analysis for the Behavioral Sciences
by Jacob Cohen
ISBN: 0805802835

Dave

--- "Lai L." <laihere@YAHOO.COM> wrote:
> Hi, I am working on power analysis for a study sample
> design with correlated observations and need your
> recommendations on useful referece books, websites or
> formula.
>    Briefly, here is what our study design is like: we
> will recruit 20 health workers, each of whom will find
> "n" smokers in his community. Half of them will be
> randomly assigned to receive certain treatment, half
> of them don't. At the end of study period, we will
> check if smokers quit smoking in both groups. So the
> outcome will be binomial. And these "n" smokers will
> be correlated to some degree. Our power analysis has
> to address this correlation problem.
>    I look forward to hearing your advice. Thank you
> very much!
>
> -LL
>
>
>
> __________________________________________________
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