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st: Displaying ttest results


From   "Yvonne Capstick" <yvonnecapstick@hotmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Displaying ttest results
Date   Sat, 19 Aug 2006 09:47:25 -0400

Hi,

i am using ttest to test the equality of variables across a group, i.e.

foreach var in var1 var2 var3 var4 ... {
ttest `var', by(group)
}

When it displays the results for each variable, it gives the standard ttest table (see below) without mentioning the variable it refers to. Of course, I can figure it out by counting which table it is in the list (i.e. if it's the 13th table, it must be testing equality of the 13th variable) but is there a smart way to do it so that it lists the variable being tested in the table header?

Thanks,
YC

Two-sample t test with equal variances
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 6713 .0121423 .0010673 .0874496 .01005 .0142346
1 | 5748 .0029847 .0010272 .0778774 .000971 .0049984
---------+--------------------------------------------------------------------
combined | 12461 .0079181 .0007462 .0832931 .0064555 .0093807
---------+--------------------------------------------------------------------
diff | .0091577 .0014946 .006228 .0120874
------------------------------------------------------------------------------
diff = mean(0) - mean(1) t = 6.1271
Ho: diff = 0 degrees of freedom = 12459

Ha: diff < 0 Ha: diff != 0 Ha: diff > 0
Pr(T < t) = 1.0000 Pr(|T| > |t|) = 0.0000 Pr(T > t) = 0.0000

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