各位好:
今天看了连玉君老师关于均值差异的t检验,敲相同代码时出现了“t t ambiguous abbreviation”的情况。
不知道是什么回事,烦请赐教呀。
normdiff $x, over(collgrad)
The number of observations with data in each row (created by -varlist-) is not unifo
> rm.
The -n- option was changed from n(below) to n(over).
Mean: Mean: Difference: N: N:
collgrad==0 collgrad==1 Normalized collgrad==0 collgrad==1
wage 6.9105612 10.526063 .40166265 1714 532
hours 36.718878 38.826742 .13533367 1711 531
tenure 5.7114443 6.8328616 .14200624 1701 530
ttl_exp 12.252842 13.443958 .19016066 1714 532
. diff t p n(below) f(%16.2f) quietly nonormdiff
t ambiguous abbreviation