Kalpa, I think you have the wrong mailing list... unless HttpClient is branching out into whole new areas!
I suspect you want to head back to http://commons.apache.org/math/ and find the mailing lists for that under the Project Information section. Thanks, Sam On 20 February 2010 11:48, kalpa rajadurai <[email protected]> wrote: > Hi Team, > > We are working on a small project in designing a web based statistical > calculator, supporting certain distribution functions. > > we used method *cummulativeProbability(double x)* of *class > NormalDistributionImpl* for implementing Normal distribution function. > > We tried to cross check Apache API's result with that of OpenOffice Calc and > Excel's result. In most of the cases, the results matched with each other. > But in certain rare cases, the cumulativeProbability() method returned by > slightly different result when compared to the result returned by NORMDIST() > function of openoffice calc and Excel. > > Here goes the illustration of the case where we found the mismatch in > results: > > *Using Apache's API:* > NormalDistribution normDist = new NormalDistributionImpl(40,1.5); > try{ > System.out.println("cummulative probability:: > "+normDist.cumulativeProbability(0.908789)); > } > catch(MathException e){ > e.printStackTrace(); > } > > *Result:* > cummulative probability:: *-8.104628079763643E-15* > > *Using openoffice calc:* > Same input values given in openoffice calc using the formula: > *=NORMDIST(0.908789;40;1.5;1)* > > *Result:* > *0.0* > > *Using Microsoft Excel:* > Same input values given in excel using the formula: > *=NORMDIST(0.908789;40;1.5;1)* > > *Result:* > *5.0738E-150* > > *Different results:* > Apache -8.104628079763643E-15 > Openoffice 0.0 > Excel 5.0738E-150 > > We wish to know the following things, > 1.) What is the reason for this variation in results? > 2.) Which result is more accurate? > 3.) Is there any possibility to get the same results as Open Office or Excel > for this case, using Apache's API? > > Hope to receive reply from your team at the earliest as possible. > Thanks in Advance > > -- > Karpaga R > > "Did you always know that?" > "No, I didn't. But I believed" > ---Matrix III > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
