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 [quote="Legion"]Yeah, also Excel does t-test, p-test, a-test for you! But you gotta know haow to drive the thing.[/quote]
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Legion
Posted: Thu Apr 10, 2003 10:58 am    Post subject: 1

Yeah, also Excel does t-test, p-test, a-test for you! But you gotta know haow to drive the thing.
Ghost Post
Posted: Wed Apr 09, 2003 12:11 am    Post subject: 0

no problem, the stats ap is fast approaching so this stuff is at the forefront of the ol' mind
Bicho the Inhaler
Posted: Wed Apr 09, 2003 12:03 am    Post subject: -1

Ha ha, that looks vaguely familiar. Thanks, RSA.
Ghost Post
Posted: Tue Apr 08, 2003 10:58 pm    Post subject: -2

you look up the Z value you get on a table to see the probability of result that or more extreme. You need to decide in advance how small the probability should be to be significant, usually 5% or 1%.
Ghost Post
Posted: Tue Apr 08, 2003 10:41 pm    Post subject: -3

no, it's a two sample z test
p=proportion with Q

z=                      p1-p2
sqrt(ppooled(1-ppooled)(1/n1+1/n2))
Bicho the Inhaler
Posted: Tue Apr 08, 2003 9:25 pm    Post subject: -4

I can't remember my statistics training! Suppose I take two samples, consisting say of N1 and N2 individuals, and I find that M1 individuals of the N1 sample have property Q, and M2 individuals of the N2 sample have property Q. How do I determine if the difference between the two samples is significant? Is this the t-test? I don't remember exactly how to do this type of test; when the results are valid; etc.