对已知数据列进行抽样，统计其均值分布的脚本

[#1]

从已知数据列中进行放回（或不放回）抽样，再统计每个样本的均值及分布，这个脚本如何编辑？例如，有2000个数据，每次随机抽取20个数据计算其均值，一共抽取100次，计算这100个样本的均值以及分布状况；

[#2]

What do you mean by calculating distribution?

[#3 · Accepted solution]

Here is a script to take 100 subsets and calculate the mean:

dt = Open( "$SAMPLE_DATA/Aircraft Incidents.jmp" );
:Latitude << Format("Best");
dt << Select Where( Is Missing( :Latitude ) ) << Delete Rows;

runs = 100;
//runs= 100000;

results = new table("results", add rows (runs), new column ("mean"));
rows = index (1, nrows(dt)); 
for each({i},index(1,runs),
myRows = Random Shuffle( rows)[1::20];
data = dt[myRows, "Latitude"];
results[i,"mean"]=Mean(data);
);

my Mean = Col Mean(:mean);
Show(myMean);

... and the mean of the means.

And with this script, you can use the Distribution platform to fit the 100 mean values with "all" available distributions:

dist = results << Distribution(Continuous Distribution(Column( :mean ));	);
dist << Fit All

[#4]

Thanks!