Re: Confidence interval is mathematically equivalent to hypothesis test

[Werner LEMBERG]

> I just responded to your statements about the relations between CIs
> and hypothesis test that a CI is *not* always associated with a
> hypothesis. The equations I mentioned were only examples for a
> confidence interval and its equivalent hypothesis test.  [...]

Thanks a lot to all who have responded.  I must add that I'm not only
a PSPP novice, my knowledge of (and, admittedly, my interest in)
statistics in general is very small.  I'm basically looking for
statistical recipes that I can apply.

What I actually want to do is to replace the mediocre PDF output of
SPSS (which my daughter was using to create images for her MD thesis –
I don't know SPSS and she has no longer access to it, so there is no
chance to improve the created bar diagrams directly) with the route

  .SAV file -> PSPP -> CSV -> LaTeX pgfplots

mainly to be able to recreate the diagrams programmatically, without
using a GUI (I guess that R would be probably a better choice for that
purpose, but I don't know this either).

In other words I'm just poking with a stick in the dark...

Here is the command that her group was using on SPSS.

  GLM Var1 Var2 Var3 BY Group WITH Age
    /WSFACTOR=Location 3 Polynomial
    /METHOD=SSTYPE(3)
    /PLOT=PROFILE(Group*Location)
       TYPE=BAR ERRORBAR=CI MEANREFERENCE=NO
    /PRINT=DESCRIPTIVE ETASQ
    /CRITERIA=ALPHA(.05)
    /WSDESIGN=Location
    /DESIGN=Age Group.

[There are two groups, with approx 15 cases each.]

The diagram shows bars for the mean values of Var{1,2,3} together with
error bars indicating the CI.


    Werner