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st: Testing the Significance of Differences Using Traditional T-Tests & Bootstrapping‏


From   Csaba Kertai <csaba.kertai@hotmail.co.uk>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: Testing the Significance of Differences Using Traditional T-Tests & Bootstrapping‏
Date   Wed, 19 Jun 2013 00:44:26 +0200

Dear All,

I am in the midst of writing my dissertation and I need to test a few things but being relatively new to Stata I need a bit of help.

Long story cut short, I have 9 variables that have different numbers of observations and I need to test the significance of the difference of the mean, 10th percentile, 25th percentile, median, 75th percentile, 90th percentile, and the percentage of positive observations for 2 variables using traditional t-tests as well as bootstrapping.

Testing the significance of mean differences is ok. I guess I just have to use the 'Two-sample mean-comparison test'. My only question re. this test is; should I tick 'unequal variances'?

My real problem though is testing the significance of the difference of the median, 'x'th percentile, and the percentage of positive observations. How should I go about testing these using t-tests and bootstrapping?

Thank you very much indeed, your help is greatly appreciated!

Kind regards,

C. 		 	   		  

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