LOS ANGELES (CNS) — Thousands of Los Angeles County residents will receive questionnaires in the mail next week as part of a test by the U.S. Census Bureau aimed at refining the way it will collect data during the 2020 Census.

About 225,000 households will be asked to take part in the test, and questionnaires can be filled out and submitted online or by mail. Participants will be asked questions such as how many people are living or staying at the home, is the residence owned or rented and what is the ethnicity of residents.

Questionnaires are expected to be sent some or all people in ZIP codes 90022, 90031, 90032, 90033, 90041, 90042, 90063, 90065, 90089, 91030, 91101, 91105, 91106, 91107, 91108, 91754, 91755, 91770, 91775, 91776, 91780, 91801 and 91803.

More information about the 2016 Census Test is available online at www.census.gov/2016censustest.