"between differences in medians" should be "between differences in
medians and other percentiles".
On Wed, Jun 10, 2009 at 5:42 PM, <[email protected]> wrote:
> -cendif- by Roger Newson, is part of the -somersd- package,
> downloadable from SSC (type "ssc install somersd". It computes CI's
> for, and tests, differences between medians. You will need large
> sample sizes to test the difference between 5th percentiles with
> reasonable power. What do you mean by "number of observations in the
> 5th percentile"? You should not group data prior to the analysis.
>
> -Steve
>
>
>
> On Wed, Jun 10, 2009 at 10:57 AM, Susanne
> Neckermann<[email protected]> wrote:
>> Hi!
>>
>> I want to test whether the difference in the fifth percentile of two
>> distributions is significant.
>> In principle, this test should be similar to the "median" (thats the name of
>> the command) test already implemented in Stata, but unfortunately I cannot
>> program .ado files and I could not find a user-written procedure.
>> Any idea how to go about this?
>> P.S. the number of observations in the fifth percentile is pretty low
>> (around 6), so one might have to use something with bootstrap or
>> permutations.
>>
>> Thank you so much in advance
>> susanne
>>
>>
>>
>> *
>> * For searches and help try:
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>> * http://www.ats.ucla.edu/stat/stata/
>>
>
*
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