program onesample,rclass
set obs 30
gen x=runiform()
sum x
return scalar mean_sample=r(mean)
end
set more off
simulate xbar=r(mean_sample),seed(101) reps(10000) nodots:onesample
hist xbar,normal
为什么我明明模拟10000次，最后只出现一个观察值
求助啊大佬