Re: getting the confidence interval

[Mark Hancock]

I unfortunately don't know enough about PSPP syntax to suggest how to do this, but a CI is not always associated with a hypothesis and can be calculated from just a mean and SD (and a cumulative distribution function, which is typically the normal one). Typically the formula is something like:

mean ± z(SD/sqrt(n)), where z is from the CDF.

On Fri, Oct 12, 2018 at 6:29 AM John Darrington <address@hidden> wrote:

The confidence interval is a concept associated with a hypothesis.
If it's the confidence interval on the test for a mean value, typically you
would get that by using a T-Test.


On Fri, Oct 12, 2018 at 10:40:22AM +0200, Werner LEMBERG wrote:

     Folks,


     I would like to get a 95% confidence interval so that I could use it
     in AGGREGATE, e.g.,

       AGGREGATE OUTFILE * MODE ADDVARIABLES
         /BREAK=...
         /Mean = mean(V)
         /CI = ci(V, 0.95)

     What must I do to get the result of my hypothetical `ci' function?
     I'm a PSPP novice, so maybe there is a better solution than AGGREGATE
     ??? what I ultimately want is to emit the confidence interval of a
     variable to a CSV file using SAVE TRANSLATE.


         Werner
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