-------- Original Message --------
Subject: details of my SAMPLE SIZE CALCULATION
Date: Mon, 1 Jun 2009 19:01:39 -0700 (PDT)
From: ali mahmood <[email protected]>
To: [email protected]
Dear All
Thank you all for your help, I put hear detailed information about what
I' m looking for.
I'm going to compare the facial geometric morphometric differences
among ethnic groups of my population . we have around 6 groups. My
comparison will be carried out in term of gender among the groups and in
each group. we put some selection criteria like the absence of any
facial deformities, the subject must be from the same group for 3
generations, the age need to be between 20- 40 years. The number of
landmarks is 36, 10 of them in mid line of the face (single ) and
the other 26 are arranged bilaterally (13 landmarks, 1 on each side so
they are 26). My question is shall I applied the traditional way for the
calculation ( by using the power, alpha, the mean, SD and so on) or
there is a specific way for the geometric morphometric data?
I hope you can help me to calculate the sample size for each subgroup.
with my regards.
yours
Ali
--- On *Mon, 6/1/09, morphmet /<[email protected]>/*
wrote:
From: morphmet <[email protected]>
Subject: Re: SAMPLE SIZE CALCULATION
To: "morphmet" <[email protected]>
Date: Monday, June 1, 2009, 7:30 PM
-------- Original Message --------
Subject: Re: SAMPLE SIZE CALCULATION
Date: Mon, 1 Jun 2009 09:18:23 -0700 (PDT)
From: Dany Adams <[email protected]
<http://us.mc574.mail.yahoo.com/mc/[email protected]>>
To: <[email protected]
<http://us.mc574.mail.yahoo.com/mc/[email protected]>>
There is an excellent package called Power and Precision. You can
get a
free trial download at
http://www.power-analysis.com/power_analysis.htm, but I recommend
buying it just for the booklet that comes with it. The web site
itself probably has good stuff on it. The explanation of what you
are doing, and why you are doing it, is really terrific. The
program itself is very easy to use.
There are also calculators on the web, just google "sample size
calculator" but I haven't specifically tested them.
Dany (glad to finally have something to contribute to morphmet)
-- Dany Spencer Adams, PhD
Research Associate Professor
Department of Biology, Tufts University
TEL (617) 627-6204
FAX (617) 627-5305
[email protected]
<http://us.mc574.mail.yahoo.com/mc/[email protected]>
MAILING ADDRESS:
Dany Adams
Tufts Center for Regenerative and Developmental Biology
200 Boston Avenue, Suite 4600
Medford, MA 02155
> From: morphmet <[email protected]
<http://us.mc574.mail.yahoo.com/mc/[email protected]>>
> Reply-To: <[email protected]
<http://us.mc574.mail.yahoo.com/mc/[email protected]>>
> Date: Mon, 01 Jun 2009 11:51:44 -0400
> To: morphmet <[email protected]
<http://us.mc574.mail.yahoo.com/mc/[email protected]>>
> Subject: SAMPLE SIZE CALCULATION
> Resent-From: <[email protected]
<http://us.mc574.mail.yahoo.com/mc/[email protected]>>
> Resent-Date: Mon, 1 Jun 2009 08:54:17 -0700 (PDT)
>
>
>
> -------- Original Message --------
> Subject: SAMPLE SIZE CALCULATION
> Date: Fri, 29 May 2009 05:23:54 -0700 (PDT)
> From: ali mahmood <[email protected]
<http://us.mc574.mail.yahoo.com/mc/[email protected]>>
> To: [email protected]
<http://us.mc574.mail.yahoo.com/mc/[email protected]>
>
>
>
>
>
> Dear ALL
>
> I need to calculate my sample size before starting new
geometric
> morphometric study, any one can tell me the steps that I
need to
> follow to do this ? . with my regards.
>
>
> yours
>
> Ali
>
>
>
>
> -- Replies will be sent to the list.
> For more information visit http://www.morphometrics..org
<http://www.morphometrics.org/>
>
-- Replies will be sent to the list.
For more information visit http://www.morphometrics.org
<http://www.morphometrics.org/>
--
Replies will be sent to the list.
For more information visit http://www.morphometrics.org
