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With today’s announcement that the release date for the 2020 Census Public Law 94-171 Redistricting Data will be Thursday, August 12, we have rescheduled the webinar analyzing the effect of the new confidentiality protection production settings on redistricting and Voting Rights Act use cases. The new date for the webinar is Tuesday, August 10, 3:00-4:00 p.m. ET.
The analysis allows data users to compare the effect of the production settings on previously published 2010 Census data. It updates an earlier analysis that was based on the April 2021 development version.
The protections are based on a technique known as differential privacy. As with methods we’ve used in the past, differential privacy works by adding statistical noise, or “fuzziness,” to the data. However, differential privacy ensures that the noise is added in a calibrated way. Enough noise is added to protect confidentiality, but not so much as to damage the statistical validity of our publications.
The algorithm that calibrates noise for the redistricting data (P.L. 94-171) is called the TopDown Algorithm. It was specifically tuned to meet stringent fitness-for-use accuracy targets for the redistricting and Voting Rights Act use cases.
*Note: New Log-In Information
August 12:
By September 30:
* Released via Census Bureau FTP site.
** Released via data.census.gov.
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