Greetings,

I'm running Stata 15.1 on OSX. I have a variable containing standardized test scores, which I'd like to either transform this variable or create another that stores them according to specific percentiles. These percentiles should correspond to a normal distribution (i.e. 0.1, 2.2, 13.6, 34.1, 34.1, 13.6, 2.2, 0.01). I know xtile can divide variables into n quintiles, but I wasn't sure how to configure it to obtain the desired cutpoints. Any help would be much appreciated. Thanks!

Sample data:
Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input float IQ
         .
-1.2351986
  .2448673
  .4643255
  1.889084
 1.9801397
  .1742738
 .05650223
  .6005792
 -.4292795
 1.4921693
 1.6413466
 1.0393566
  1.959469
  1.384924
  .2740149
 1.6423193
  1.861465
         .
  .8555078
  1.598789
 1.6248794
  1.418067
  .8210449
  .3124731
 1.8996103
 1.8856792
  1.750537
 -.5728984
-1.1765907
         .
         .
         .
-1.2620186
   .370004
         .
  .4827034
-1.0285945
-.54003346
-.13815095
 .51066977
  -.697236
 -.9404569
-.18532906
 .28603524
 1.2402283
 1.1491377
 -.6110786
 1.0015932
 1.2627057
         .
  .9270393
 .04326595
         .
         .
  1.168141
 -.4017995
 1.7102726
 1.9609627
 1.4099375
 1.9716977
-.20884864
  1.582044
  1.757659
  1.138646
 -.6860147
 1.7665875
 2.0012274
  1.539278
         .
 1.9344207
 1.3251003
  1.359459
  1.846144
  1.423799
.013354048
 1.8912725
 1.4921693
  1.865182
 1.2632962
 -.4481091
-1.3975427
 -1.390664
 -.7430245
-1.3885448
 -1.222796
-1.0398853
  1.334133
 1.4794194
 1.3167626
 -.6799698
 .06876576
 -.4848997
         .
-.27176437
 -.1953692
 .59112966
   .943437
         .
-.06859969
end