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MathGroup Archive 2004

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Re: populate a list with random numbers from normal distribution?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg49870] Re: [mg49855] populate a list with random numbers from normal distribution?
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Thu, 5 Aug 2004 09:20:31 -0400 (EDT)
  • Reply-to: hanlonr at cox.net
  • Sender: owner-wri-mathgroup at wolfram.com

Needs["Statistics`ContinuousDistributions`"];

data=RandomArray[NormalDistribution[50000,25000],{1000}];

#[data]& /@ {Mean, Variance, StandardDeviation} // N

{49212.297808892145, 6.388327485991619*^8, 
  25275.140921450107}

Since you seem to want Integers

data=Round /@ data;

#[data]& /@ {Mean, Variance, StandardDeviation} //N

{49212.299, 6.388324440996987*^8, 25275.134897754724}


Bob Hanlon

> 
> From: sean_incali at yahoo.com (sean kim)
To: mathgroup at smc.vnet.net
> Date: 2004/08/04 Wed AM 10:46:33 EDT
> To: mathgroup at smc.vnet.net
> Subject: [mg49870] [mg49855] populate a list with random numbers from normal 
distribution?
> 
> hello group. 
> 
> I looked at the help browser but i can't figure this out. I weant to
> make a list of random numbers sampled from a normal distribution
> 
> In[90]:= Needs["Statistics`ContinuousDistributions`"]
> 
> l1 = Table[Random[NormalDistribution[50000,25000], Integer, {10000,
> 99999}], {1000}];
> 
> Variance[l1]//N
> StandardDeviation[l1]//N
> 
> 
> From In[90]:=
> Random::"randt":
> Type specification NormalDistribution[50000, 25000] in 
> <<1>> should be Real, Integer, or Complex.
> 
> Out[92]=
> 0.
> Out[93]=
> 0.
> 
> thanks in advance for any insights
> 
> sean
> 
> 


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