Re: Inferential stats on TI-89: Pool the lists?


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Re: Inferential stats on TI-89: Pool the lists?



> Thanks for your quick response! You are probably right. I have one more
> question, though. I just noticed that my TI-89 asks me whether to pool the
> lists when either data input method is used. Does it make sense to pool the
> lists when stats are used?

Yes, it can be done -- in fact, the pooled estimated variance is simply a
weighted average of the two sample variances.  I'll spare everyone the
details of the formula here; look it up if you're interested.
--
Darryl K. Nester              e-mail: mailto:nesterd@bluffton.edu
Assoc. Prof. of Mathematics      WWW: http://www.bluffton.edu/~nesterd
Bluffton College               phone: 419-358-3483 (w)  419-358-9650 (h)
Bluffton, OH  45817-1704         fax: 419-358-3232 (w)  419-781-7113 (h)

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