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st: Problem with -ci- in particular dataset


From   Philip Greenwood <philip.greenwood@mcri.edu.au>
To   statalist@hsphsun2.harvard.edu
Subject   st: Problem with -ci- in particular dataset
Date   Wed, 04 May 2005 16:07:21 +1000

Dear Statalisters,

I'm having a little trouble with the -ci- command with several binary variables in a particular dataset. The problem  is reproducible on other machines with this dataset, but not with other datasets. The problem is that -ci- displays 0 for all statistics, yet the correct results are returned to macros. I'll paste some output;

*--snip

. codebook var1

--------------------------------------------------------------------------------
var1
-------------------------------------------------------------------------------

                  type:  numeric (byte)

                 range:  [0,1]                        units:  1
         unique values:  2                        missing .:  0/1102

            tabulation:  Freq.  Value
                           825  0
                           277  1

. ci var1

    Variable |        Obs        Mean    Std. Err.       [95% Conf. Interval]
-------------+---------------------------------------------------------------
        var1 |       1102           0           0               0           0

. return list

scalars:
                r(ub) =  .2770129342413987
                r(lb) =  .2257093888076031
                r(se) =  .0130734919800961
              r(mean) =  .2513611615245009
                 r(N) =  1102

*---snip

Other commands such as -summarize- are not producing the same problem. All I can think of is that the displayed values are getting rounded to integer values somehow. -ci- normally works fine. Does anyone have any suggestion as what is wrong with my dataset?


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