save ttest results and form a summary statistics table

[Yao Zhao]

I need to do 3 t tests.

foreach n in addition deletion total {
   ttest pre`n' == post`n'
}

And for each t test, I need to store their r(mu_1), r(mu_2), two Std. Err., and r(t).

Finally, I need to create a table like this:

My idea is that I first store these numbers, and then I can list them in a matrix, and then I can transfer this matrix to my LaTex file.

[Yao Zhao]

How to get access to these numbers and form a matrix?

[Daniel Shin]

Since you like frames, I suggest you look at frame post. Create a frame, then post the results into that frame following a command:

frame creat newframe var1 var2 var3 ...
ttest var1==var2
frame post newframe (r(mu_1)) (r(sd_1)) ... (r(p))

Then export the frame.

[Yao Zhao]

Aha, Daniel, see you again.

r(sd_1) is not correct. I need standard error of two means, not standard deviation. I didn't see SE in the -return list-.

Also, why do you think frame will be helpful? I don't see the benefits here.

[Yao Zhao]

I figure out how to get SE: di r(sd_1)/(sqrt(r(N_1)))

But I still dont' need to fill in the loop.

[Daniel Shin]

It is helpful in that you can export a table of estimates and create a table like the one you have on top. You can use putdocx table or something equivalent, and with proper formatting, make the same table as above. Better than copying and pasting outputs!