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Re: st: RE: "weighed centiles"


From   Cinzia Rienzo <[email protected]>
To   [email protected]
Subject   Re: st: RE: "weighed centiles"
Date   Thu, 1 Mar 2007 10:30:26 +0000 (GMT)

Thanks Nick
 it worked!

cinzia

Nick Cox wrote:


>Consider 
>
>. sysuse auto, clear 
>
>. su mpg [w=weight], detail
>(analytic weights assumed)
>
>                        Mileage (mpg)
>-------------------------------------------------------------
>      Percentiles      Smallest
> 1%           12             12
> 5%           14             12
>10%           14             14       Obs                  74
>25%           16             14       Sum of Wgt.      223440
>
>50%           19                      Mean           20.11153
>                        Largest       Std. Dev.      5.400251
>75%           23             34
>90%           28             35       Variance       29.16271
>95%           30             35       Skewness       1.121803
>99%           35             41       Kurtosis       4.694955
>
>. di r(p90) - r(p10)
>14
>
>That may be what you want.
>
>Nick 
>[email protected] 
>
>Cinzia Rienzo
>
>> i have to compute the gap centile  (90-10) for the variable 
>> "res1st_zs" 
>>  and weighed by the variable "hwt" for time series data. 
>> But STATA does not allow me weighed centile, i also tried the 
>> "dialog" 
>> but i didn t get the results i wanted.
>
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