Message-ID: <A8F06ECB-EE5C-4CEE-9DC7-55128F37EEF2@comcast.net>
Date: 2011-05-28T21:12:11Z
From: David Winsemius
Subject: Three sigma rule
In-Reply-To: <000901cc1d62$d50dbe70$7f293b50$@com>
On May 28, 2011, at 2:12 PM, Salil Sharma wrote:
> Dear Sir,
>
>
>
> I have data, coming from tests, consisting of 300 values. Is there a
> way in
> R with which I can confirm this data to 68-95-99.8 rule or three-
> sigma rule?
Can you describe this rule? I get the idea that it might be "private
language" adopted by the SigxSigma sect.
>
> I need to look around percentile ranks and prediction intervals for
> this
> data. I, however, used SixSigma package and used ss.ci() function,
> which
> produced 95% confidence intervals. I still am not certain about
> percentile
> ranks conforming to 68-95-99.7 rule for this data.
The quantile function is pretty much "standard operating procedure".
fivenum will return the values that would appear in a box-and-whiskers
plot.
--
David Winsemius, MD
West Hartford, CT