Date:         Wed, 17 Sep 2003 15:02:16 -0230
Reply-To:     Nan Li <nanl@nlchi.nf.ca>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         Nan Li <nanl@nlchi.nf.ca>
Subject:      Help for methodology of sample size calculation
Content-Type: text/plain; charset="iso-8859-1"

Dear lister,

I would like to inquire the methods of calculating survey sample size. I
would like to draw a random sample from the entire province to study the
differences by age (3 groups), gender (2 groups), income (3 groups), and
urban (2 groups), how many samples I should draw from the entire province
(the total population of the province is 600,000) (Telephone survey will be
used). And which kind of methodology or formula I should use for
calculation.  In addition, I will also investigate the differences of the
same 4 categorical variables by two communities in this province, and how
many random samples should be drew from these 2 communities respectively.
The population is 25,000 for one community and 18,000 for the other.

Any input would be highly appreciated. Thanks in advance!

Nan