The purpose is to try to classify the samples to each control group. What I did is using MSExcel chart to display these sample and control values in a line chart so I know where sample data point relative to control data point, so I decide each sample belongs to which control. (this is a classification with a single variable)
But it is kind of arbitrary in the above process. So I wonder if there is a statistic to indicate the confidence /likelihood of my classificatin for each sample. For example. which is better, consider 1.23 as control type: 0.8 or as control type 1.7? "Anon." <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > Henry wrote: > > I have a set of sample results and controls for 3 levels. > > > > Control values like : 0.8; 1.7; 2.5 > > sample values: 0.45, .75, 0.9, 1.2, 1.23, 1.35, 1.45, 1.55, 1.54, > > 1.78, 1.89, 1.98, 2.01, 2.33, 2.45, 2.65, 2.8, 3.0 > > > > In practics, I simply based on each sample data point position > > relative to control in Excel chart to classify them to a control > > group. > > I'm sorry, you'll have to re.write this - I can't parse the sentence, > and I suspect few others can too. I can make a guess about what you're > asking (in which case, there is a solution to your problem), but I'd > rather wait to be confused later. > > I wonder if there is any statistical parameter I can compute to > > support my claim that 1.23 should be more like control of 0.8, but not > > control of 1.7? is there some kind of likelihood or probabilty to be > > computed? > > > > Seems silly, but it does happen a lot in reality. > > Sounds like life. > > Bob > > -- > Bob O'Hara > > Rolf Nevanlinna Institute > P.O. Box 4 (Yliopistonkatu 5) > FIN-00014 University of Helsinki > Finland > Telephone: +358-9-191 23743 > Mobile: +358 50 599 0540 > Fax: +358-9-191 22 779 > WWW: http://www.RNI.Helsinki.FI/~boh/ . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
