Three sigma rule
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