程序是这样的(按照陈强那本高级计量经济学及stata应用第二版做的,不知道为什么不对)
program onesample, rclass
drop _all
set obs 30
gen x = runiform()
sum x
return scalar mean_sample = r(mean)
end
simulate xbar = r(mean_sample), seed(101) reps(10000): one sample
(在这一行报错了
invalid syntax
an error occurred when simulate executed isample
r(198);
最后一步应该是
hist xbar, normal xtitle("xbar from many sample")
尝试了很多次,以为是命令库没更新,去更新了也不行,,,球球大佬们不吝赐教orzzzzzzz


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