Re: Quantile function
- To: mathgroup at smc.vnet.net
- Subject: [mg35374] Re: [mg35316] Quantile function
- From: BobHanlon at aol.com
- Date: Wed, 10 Jul 2002 02:19:39 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
In a message dated 7/8/02 3:37:12 AM, a at a.a writes: >When using the quantile function: > >In[7]:= >Quantile[dist, 0.8] > >Out[7]= >0.841621 > >can anyone tell me how to get more accuracy? > Needs["Statistics`NormalDistribution`"] dist = NormalDistribution[0, 1]; Quantile[dist, 0.8] 0.841621 The display is truncated for output. The InputForm shows this. Quantile[dist, 0.8] // InputForm 0.8416212335729144 NumberForm will display additional digits but only up to the maximum consistent with machine precision. NumberForm[Quantile[dist, 0.8], 20] 0.841621233572914 For precision beyond machine precision you need to use exact or higher precision numbers in the definition of the distribution (as above) and in the call to Quantile. N[Quantile[dist, 8/10], 20] 0.84162123357291420518 Quantile[dist, N[8/10, 20]] 0.84162123357291420518 Bob Hanlon Chantilly, VA USA