Date:         Tue, 17 Jan 2012 12:07:43 -0700
Reply-To:     Joe Matise <snoopy369@GMAIL.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Joe Matise <snoopy369@GMAIL.COM>
Subject:      Re: What  statistical method/proc would work for this "trend"?
Comments: To: Irin later <irinfigvam@yahoo.com>
In-Reply-To:  <1326826317.96333.YahooMailNeo@web39406.mail.mud.yahoo.com>
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Don't know about the stat parts, but there is a weekday format to determine Fridays (then check time for night according to your rules).

-Joe

Sent from my iPhone

On Jan 17, 2012, at 11:51 AM, Irin later <irinfigvam@YAHOO.COM> wrote:

> I am working on analysis based on hypothesis that certain medical surgery is mostly scheduled
> on fridays nights rather than on others week days.
> The  extract for year 2011 was 1300 unique medical claims for the certain surgery.
> Other years extracts are comparable in terms of # of claims for years 2008, 2009, 2010.
> Not having an experience , I am really confused....
>
> How can I do it? Could you please give me a hand?
> I actually wonder:
>
> 1. How to extract fridays nights?
> 2. Do I need randomly select a month for the certain year?
> 3. what would be an appropriate kind of statistical method and procedure for this scenario?
>
> Thank you in advance,
>
> Irin