Re: Chi Square Areas

*To*: mathgroup at smc.vnet.net*Subject*: [mg110909] Re: Chi Square Areas*From*: Bill Rowe <readnews at sbcglobal.net>*Date*: Sun, 11 Jul 2010 06:19:13 -0400 (EDT)

On 7/10/10 at 4:01 AM, s123 at epix.net (Steve) wrote: >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 ? Use Quantile. For example, In[3]:= Quantile[ChiSquareDistribution[8], .95] Out[3]= 15.5073 In[5]:= Quantile[ChiSquareDistribution[5], .9] Out[5]= 9.23636