Re: [Maxima-discuss] "distrib" package

[Soegtrop, M. <mic...@in...>]

Dear Henry,

this is called the Behrens Fischer problem. As far as I know there are no exact solutions to it, just various approximations. The most common approximation is from Welch. 

See http://en.wikipedia.org/wiki/Behrens%E2%80%93Fisher_problem.

Best regards,

Michael

-----Original Message-----
From: Henry Baker [mailto:hb...@pi...] 
Sent: Wednesday, September 03, 2014 4:23 PM
To: max...@li...
Subject: [Maxima-discuss] "distrib" package

I am just starting to play with the "distrib" package, and it looks to be very cool!

I'm extremely rusty on my probability, so I'd like to ask an extremely simple question:

Suppose I take 8 samples from normal distribution A and 8 samples from normal distribution B, each with its own mean and variance.

What is the probability that the sum of the 8 A-samples will exceed the sum of the 8 B-samples ?

Of course, "8" might also be some other number, like 5.

Thanks for any help.


------------------------------------------------------------------------------
Slashdot TV.  
Video for Nerds.  Stuff that matters.
http://tv.slashdot.org/
_______________________________________________
Maxima-discuss mailing list
Max...@li...
https://lists.sourceforge.net/lists/listinfo/maxima-discuss