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Regarding Goldfish's comment that the Office of Planning’s household size calculation is inaccurate: The calculations provided are correct. Average household size is calculated by not including "group quarters", which the Census Bureau's 2011 American Community Survey defines as “a place where people live or stay, in a group living arrangement that is owned or managed by an entity or organization providing housing and/or services for the residents.” Examples of group quarters are correctional facilities, student housing, military quarters, and homeless shelters. Please refer to http://www.census.gov/acs/www/Downloads/data_documentation/GroupDefinitions/2011GQ_Definitions.pdf for more information regarding group quarters.

Therefore, the formula OP used to calculate average household size is: Average Household Size = (Total Population less Group Quarters Population) divided by Number of Households.

Hence, the average household size for 2010 is calculated as follows: (601,723 – 40,021 = 561,702) divided by 266,707 = 2.106 which is approx. 2.11

Similarly, the average household size for 1950 is calculated as follows: (802,178 – 86,377 = 715,801) divided by 224,142 = 3.19

The Office of Planning takes very seriously its responsibility in providing accurate and timely data. Please visit www.zoningdc.org for more information regarding the zoning update.

by Tanya Stern, Chief of Staff, OP on Jan 3, 2013 3:32 pm • linkreport

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