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From |
tiago.pereira@incor.usp.br |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: Sampling scheme |

Date |
Thu, 12 Jul 2007 20:00:51 -0300 (BRT) |

Dear statalisters, I have a variable in which observations take one out of 9 values: 11,12,13,21,22,23,24,31,32,33 So, observations assume the values 1`i', 1`i', 3`i', for i = 1,2 or 3. Assuming that I have 1000 observations , I would like to: (1) randomly sample, say, 25 observations satisfying the condition ==1`i' (2) randomly sample 50 observations satisfying the condition ==2`i' (3) randomly samply another 25 observations satisfying the condition ==3`i' Then, I would like to count the frequency of each `i' in the first, second and last samplings. For example, considering yet the example above, assume that among the first sampling (25 obs), 12 observations were 1`3', 10 were 1`1' and 3 were 1`2' (12+10+3 = 25 sampled observations). I would like to obtain the following result: `1' = 10 `2' = 03 `3' = 12 Is it possible to perfom such sampling scheme using Stata? Thank you very much. Tiago * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: Sampling scheme***From:*SamL <saml@demog.berkeley.edu>

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