Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: RE: RE: sampsize formula
From
William Buchanan <[email protected]>
To
[email protected]
Subject
Re: st: RE: RE: sampsize formula
Date
Thu, 3 Nov 2011 12:42:36 -0700
Hi Sara,
You should have access to the manuals via Stata. After - help sampsize - you should be able to open the .pdf file of that entry from your computer. It's possible that someone may have deleted them, but you should be able to get to things that way as well.
- Billy
On Nov 3, 2011, at 12:40 PM, Sara Borelli wrote:
> Thank you Sarah
> The problem is that we do not have access to the manuals right now, but the reference helps a lot
> thanks
>
> Sara Borelli, Ph.D.
> Research Associate
>
>
>
> IMPAQ International, LLC
> 1425 K St. NW, Suite 650
> Washington, DC 20005
> ******************************
> Phone: 443.367.0088 Ext. 2234
> Direct: 443.283.6231
> Fax: 202.289.0024
> Email: [email protected]
> Web: www.impaqint.com
>
> This e-mail and any attachments are intended only for the named recipient(s) and may contain information that is legally privileged, confidential, or exempt from disclosure under applicable law. If you have received this message in error, or are not the named recipient(s), you may not retain copy or use this e-mail or any attachment for any purpose or disclose all or any part of the contents to any other person. Any such dissemination, distribution or copying of this e-mail or its attachments is strictly prohibited. Please immediately notify the sender and permanently delete this e-mail and any attachment from your computer.
>
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On Behalf Of Sarah Edgington
> Sent: Thursday, November 03, 2011 3:36 PM
> To: [email protected]
> Subject: st: RE: sampsize formula
>
> Do you have access to the Stata base reference manuals?
> Typically the manuals contain detailed information on the formulas used to
> implement a command. The manual entry for -sampsi- is no exception. It's in
> the section titled "Methods and formulas" near the end of the entry.
> Hope that helps.
> -Sarah
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Sara Borelli
> Sent: Thursday, November 03, 2011 12:12 PM
> To: [email protected]
> Subject: st: sampsize formula
>
>
> Hello Statalist members,
>
> I would like to know the exact formula beyond the sampsi command to
> calculate the sample size of two groups using comparison of means :
>
> sampsi m1 m2, sd1() sd2() power () alpha()
>
> the output gives me the sample size of the two groups, n1 and n2, but I
> would need the exact mathematical formula
>
> Thanks for any suggestion
> Sara Borelli
>
>
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/