Survey Weights and Data Analysis

Sampling and post-sampling weights are used in the NAWS to adjust the relative value of each interview so that population estimates may be obtained from the sample.

The composite weight variable, PWTYCRD, is included in the NAWSPAD file; it should be used in all analyses to generate unbiased estimates. For a fuller explanation of the weights, please consult pages 6-13 of the Statistical Methods of the National Agricultural Workers Survey. Additional information on using the weights is available in An Introduction to Analyzing the NAWS Public Access Data.

An example of how to use the WEIGHT command in SAS to program with weighted percentages of male and female crop workers in fiscal years 2013-2014 could be implemented as follows:

proc freq data=(name of data file);
table GENDER;
where 2013 le FY le 2014;
weight PWTYCRD;