Re: Chi Square Areas

*To*: mathgroup at smc.vnet.net*Subject*: [mg110902] Re: Chi Square Areas*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Sun, 11 Jul 2010 06:17:56 -0400 (EDT)

Or use Quantile prob = {0.95, 0.90, 0.80, 0.70, 0.50, 0.30, 0.20, 0.10, 0.05, 0.01, 0.001}; TableForm[ Table[ NumberForm[ Quantile[ ChiSquareDistribution[df], 1 - p], {4, 3}], {df, 10}, {p, prob}], TableHeadings -> {Range[10], prob}, TableAlignments -> Right] Bob Hanlon ---- Patrick Scheibe <pscheibe at trm.uni-leipzig.de> wrote: ============= Hi, what about FindRoot[CDF[ChiSquareDistribution[8], x] - 0.95, {x, 1}] ? Cheers Patrick On Sat, 2010-07-10 at 04:01 -0400, Steve wrote: > Hi, > > Can someone show me how to get Mathematica to provide the areas to the > right of a given critical value of the Chi Square distribution ? > > The table entries shown at http://www2.lv.psu.edu/jxm57/irp/chisquar.html > are what I need to compute. > > For example, given 8 degrees of freedom and a probability value of > 0.05 the result would be 15.51. > > And given 5 degrees of freedom with probability 0.1 the result is > 9.24. > > How can I produce these results in Mathematica ? > > Thanks so much. >