I need some help on the bootstrap procedure either of version 7 or version 8.
What I want to do is as follows. I have a sample of size N and a matching sample of size N. Say the variable I care is x. I want to test the significance of the difference of the mean and the difference of the median between the two samples. But because the distibution of x is skewed, the conventional t-test or z-test is not good here. I am following literature, trying to use bootstrap to do it.
Basically, the procedure is first to pool the two sample to get a size 2N sample. Then randomly draw with replacement a sample of size N, get the mean and median. Then draw another one. Then calculate the difference. And repeat the above drawing and calculation 1000 times. And I will get the ditribution of the 1000 difference and can do the inference with them.
My question is how to write the Stata program to let it draw 2 random samples in each bootstrap replication.
Thank you for your help.
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