Code:
matrix table1=J(6,6,.)

ttest preaddition == postaddition
matrix table1[1,1] = r(mu_1)
matrix table1[1,2] = r(sd_1)/sqrt(r(N_1))
matrix table1[1,3] = r(mu_2)
matrix table1[1,4] = r(sd_2)/sqrt(r(N_2))
matrix table1[1,5] = r(t)

ttest predeletion == postdeletion
matrix table1[2,1] = r(mu_1)
matrix table1[2,2] = r(sd_1)/sqrt(r(N_1))
matrix table1[2,3] = r(mu_2)
matrix table1[2,4] = r(sd_2)/sqrt(r(N_2))
matrix table1[2,5] = r(t)

ttest pretotal == posttotal
matrix table1[3,1] = r(mu_1)
matrix table1[3,2] = r(sd_1)/sqrt(r(N_1))
matrix table1[3,3] = r(mu_2)
matrix table1[3,4] = r(sd_2)/sqrt(r(N_2))
matrix table1[3,5] = r(t)


matrix list table1