st: Easy Question: pvalues for means for groups

["Ben Hoen" <bhoen@lbl.gov>]

Hi all,

I am trying to find a simple way to output a set of tests (e.g., p-values)
of means (i.e., are they different from 0) across groups (there are 6 of
them).  Ideally .tabstat, which outputs a mean and a se would also produce a
pvalue (in this case, the probability that the mean is different from zero)
because that tabular output is preferable.  

**** example ****

sysuse auto, clear
g type=round((runiform()*5)+1)
tabstat price, stat(mean sem) by(type)  //in addition to these two stats it
would, ideally, produce a p-value

***** end *******

I can use .reg, of course, but I then I need to convert the coef using the
constant.

**** example ****

sysuse auto, clear
g type=round((runiform()*5)+1)
reg price ib1.type  

***** end *******

I suspect I am missing something very obvious, but I have not been able to
figure it out.  Anyone able to quickly send me on my way?

Thanks, in advance,

Ben


Ben Hoen
Staff Research Associate 
Lawrence Berkeley National Laboratory
Office: 845-758-1896
Cell: 718-812-7589
bhoen@lbl.gov
http://emp.lbl.gov/staff/ben-hoen

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