MathGroup Archive: February 2006 [00067]

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t-test question

To: mathgroup at smc.vnet.net
Subject: [mg64150] t-test question
From: Csukas Attila <attila at biking.taiiku.tsukuba.ac.jp>
Date: Thu, 2 Feb 2006 19:09:03 -0500 (EST)
Sender: owner-wri-mathgroup at wolfram.com

Dear all,

I have found an equation for comparing two means.

Ue = (na - 1)*Ua + (nb - 1)Ub/na + nb - 2    This is for the pooled 
value of distribution and

t0 = |xa-xb|/ Root Ue*(1/na+1/nb)   This is for the t value.

Sample values
na=342
nb=170
Ua=6.39
Ub=6.07
xa=177.19
xb=170.37

Does anybody have idea how this works in Mathematica?
I am not familiar with Mathematica syntax but interested how would this 
work...

Any help and idea appreciated.

Attila

Follow-Ups:
- Re: t-test question
  - From: Renan <renan.birck@gmail.com>

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