Data Dictionary: ACS 2005 -- 2007 (3-Year Estimates)
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Data Source: Social Explorer; U.S. Census Bureau
Universe: Housing units
Variable Details
T95. Median Year Structure Built
Universe: Housing units
T095_001Median year structure built
Percent base:
None - percentages not computed
Aggregation method:
Median, using bracket table: B25034, interpolation method: Pareto
Formula used to compute this variable:
Return_Value = ACS07:B25035001; if (ACS07:B25035001.IsNull) Return_Value.IsNull = true
Variables used in the formula:
Housing units: Median year structure built
Relevant Documentation:
Excerpt from: Social Explorer; U.S. Census Bureau; 2005-2007 American Community Survey 3-Year Summary File: Technical Documentation.
 
Median Year Structure Built
Median year structure built divides the distribution into two equal parts: one-half of the cases falling below the median year structure built and one-half above the median. Median year structure built is computed on the basis of a standard distribution (See the "Standard Distributions" section under "Derived Measures.") The median is rounded to the nearest calendar year. Median age of housing can be obtained by subtracting median year structure built from survey year. For example, if the median year structure built is 1968, the median age of housing in that area is 40 years (2007 minus 1968). (For more information on medians, see "Derived Measures.")