Hi all

I hope everyone is healthy.

If we want to combine categories within a table, what’s the most appropriate way to calculate margin of error or coefficient of variation?

So for example, if we want to look at children in poverty, by race/ethnicity, by county, and were using the b17020 series, for example, b17020b, and wanted to get “children” under 18, we’d have to combine three groups, “under 6”, “6 to 11” and “12 to 17”. What’s the best way to calculate margin of error or coefficient of variation for “children”?

https://data.census.gov/table?q=b17020b&g=0400000US36$0500000&tid=ACSDT5Y2021.B17020B

A couple of presentations / documents seem to explain how to do it. Are these what we’d use? I just want to check these are the most recent and would still be used.

Calculating Margins of Error the ACS Way Using Replicate Methodology to Calculate Uncertainty

https://www2.census.gov/about/training-workshops/2020/2020-02-12-acs-presentation.pdf

Worked Examples for Approximating Margins of Error. Instructions for Applying Statistical Testing

https://www.census.gov/programs-surveys/acs/technical-documentation/code-lists.html

Thanks

Gene