U.S. Census undercounted Black people, Latinos, Native Americans, officials say

[JudyM]

10. It was a validation survey

From NPR’s piece on it:

The 2020 census had big undercounts of Black people, Latinos and Native Americans
https://www.npr.org/2022/03/10/1083732104/2020-census-accuracy-undercount-overcount-data-quality

Disruptions from the coronavirus pandemic and interference by former President Donald Trump's administration raised alarms about the increased risk of the once-a-decade tally missing swaths of the country's population. COVID-19 also caused multiple delays to the bureau's Post-Enumeration Survey that's used to determine how accurate the census results are and inform planning for the next national count in 2030.

(emphasis added)

And surprise, surprise:

People who identified as white and not Latino were overcounted at almost double the rate in 2010. Asian Americans were also overcounted.