Date: Sun, 6 Jan 2008 12:44:54 +0100
Reply-To: Hector Maletta <hmaletta@fibertel.com.ar>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: Hector Maletta <hmaletta@fibertel.com.ar>
Subject: Re: can SD be greater than AM?
In-Reply-To: <4b72890a0801060241p5d18d7bem5b31dd2dfcd715ad@mail.gmail.com>
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It happens all the time, Push, especially when there are extreme
values far apart. Example:
1000 cases with the value x=0.01, one case with the value x=100.
Approx results: Mean=0.11, SD=2.23.
It may also happen in normal distributions. Take a standard normal
distribution of a variable Z with mean=0 and SD=1. Shift it slightly to the
right by making the variable W=Z+0.1. Now you have mean=0.1 and SD=1.
Hector
-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of
Pushpender Nath
Sent: 06 January 2008 11:41
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: can SD be greater than AM?
Ladies and Gentlemen
Good Day!
I have a question in my mind. I want to know "Whether Standard
Deviation can
be greater than Arithmatic Mean?"
I asked this to many fellows. Some say yes , some say no. The
fellows who
say yes, could never give me any example.
I suppose, SD can never be greater than AM. Am I right? If not then
please
give me some data example.
--
Regards
Pushpender Nath
+91 9904948425
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