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SUDAAN FAQ 
How do I analyze survey data with a stratified random sampling with allocation to strata design?

This example is taken from Levy and Lemeshow's Sampling of Populations.
page 167 stratified random sampling:  allocation of sample to strata
This example uses the jacktwn data set.
proc descript data = jacktwn filetype = sas means totals design = strwor;
  nest stratum;
  weight sampwt;
  totcnt npop;
  setenv decwidth = 3;
  subgroup quart1;
  levels 3;
  tables quart1;
  var twin;
run;
Number of observations read    :    831    Weighted count :   256998
Denominator degrees of freedom :    813

Variance Estimation Method: Taylor Series (STRWOR)
by: Variable, QUART1.

-----------------------------------------------------------------------------------
|                 |                  |
| Variable        |                  | QUART1
|                 |                  | Total        | 1            | 2            |
-----------------------------------------------------------------------------------
|                 |                  |              |              |              |
| TWIN            | Sample Size      |      831.000 |      329.000 |      369.000 |
|                 | Weighted Size    |   256998.000 |    63937.000 |   127874.000 |
|                 | Total            |    26055.397 |    19183.803 |     6737.907 |
|                 | SE Total         |     3791.044 |     2661.629 |     2696.605 |
|                 | Mean             |        0.101 |        0.300 |        0.053 |
|                 | SE Mean          |        0.015 |        0.042 |        0.021 |
-----------------------------------------------------------------------------------

Variance Estimation Method: Taylor Series (STRWOR)
by: Variable, QUART1.

-----------------------------------------------------
|                 |                  |
| Variable        |                  | QUART1
|                 |                  | 3            |
-----------------------------------------------------
|                 |                  |              |
| TWIN            | Sample Size      |      133.000 |
|                 | Weighted Size    |    65187.000 |
|                 | Total            |      133.687 |
|                 | SE Total         |      126.744 |
|                 | Mean             |        0.002 |
|                 | SE Mean          |        0.002 |
-----------------------------------------------------

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