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Re: two questions - Mathematica's statistical capacities

  • To: mathgroup at smc.vnet.net
  • Subject: [mg116368] Re: two questions - Mathematica's statistical capacities
  • From: "Sjoerd C. de Vries" <sjoerd.c.devries at gmail.com>
  • Date: Sat, 12 Feb 2011 05:18:34 -0500 (EST)
  • References: <ij2uv5$7tr$1@smc.vnet.net>

Ad b. I don't know where upon you base your impression of inferiority
of the new tests. It look like they have more possibilities than the
older one.

Also, given correct settings the results are the same, as is shown
below:

In[10]:= MeanDifferenceTest[{1, 2, 4, 6, 3}, {4, 10, 6, 8, 5, 8}, 0,
 EqualVariances -> True, TwoSided -> True]

Out[10]= TwoSidedPValue -> 0.0188017

In[8]:= LocationEquivalenceTest[{{1, 2, 4, 6, 3}, {4, 10, 6, 8, 5,
   8}}, "KSampleT"]

Out[8]= 0.0188017

In[22]:= LocationTest[{{1, 2, 4, 6, 3}, {4, 10, 6, 8, 5, 8}}, 0, "T"]

Out[22]= 0.0188017

Cheers -- Sjoerd



On Feb 11, 10:19 am, Francisco Gutierrez <fgutiers2... at yahoo.com>
wrote:
> Dear Group:
> Mathematica's statistical capacities have been enhanced in the last versions. However, I have two questions:
>
> a. Has anybody developed code for doing multi-level regressions in Mathematica? If yes, where can it be found?
>
> b. A simple but important command, MeanDifferenceTest was made obsolete. However, it was quite nice. It still works, but Mathematica informs it has been "superseded". Furthermore, the commands that are supposed to replace it, like LocationEquivalenceTest, seem inferior, and produce different results. How to interpret such differences? Anyway I hope MeanDifferenceTest is not wiped from the surface of the earth!
>
> Best,
> Francisco



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