Re: Mean

*To*: mathgroup at smc.vnet.net*Subject*: [mg32992] Re: Mean*From*: Steve Luttrell <luttrell at signal.qinetiq.com>*Date*: Sat, 23 Feb 2002 02:38:11 -0500 (EST)*Organization*: QinetiQ*References*: <a54qru$bsu$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

poonam_pandey at hotmail.com (poonam) wrote in news:a54qru$bsu$1 @smc.vnet.net: > << Statistics`DescriptiveStatistics` > > data = {4.3, 7.2, 8.4, 5.8, 9.2, 3.9} > {4.3, 7.2, 8.4, 5.8, 9.2, 3.9} > > Mean[data] > Mean[{4.3, 7.2, 8.4, 5.8, 9.2, 3.9}] > > Variance[data] > 4.69467 > > I took this code exactly as in the help browser. Tried this in my > notebook. Why do I not get an answer for Mean? I get an answer for > Variance, and I also see an answer for Mean in the help browser for > the same data. I can reproduce this behaviour if I use the symbol Mean before I input the package Statistics`DescriptiveStatistics`, when I get the following warning message: Mean::shdw: Symbol Mean appears in multiple contexts \ {Statistics`DescriptiveStatistics`,Global`}; definitions in context \ Statistics`DescriptiveStatistics` may shadow or be shadowed by other \ definitions. The simplest way (there are other ways) to avoid this problem is to start with a fresh Mathematica session, in which case your code works as you wanted it to behave. Steve Luttrell