Why can one household member answer census questions for other members of the household?

In the context of modern census procedure, the requirement to enumerate every individual does not necessitate that every person be interviewed personally. Instead, census methodology allows for proxy reporting, where one household member—such as a spouse or parent—can provide the necessary information for other members of the household.1

This practice is permitted because the primary goal of the census is to ensure that all individuals within a designated territory are counted and categorized. By allowing a representative to supply data for the household, the process remains efficient while still establishing a reliable basis for sampling and the compilation of demographic statistics.1