U.S. Census Overview. SOC 101. Outline of Presentation. Census History Census Questionnaire Census Geography Census Data American FactFinder. Census History. Survey of the United States population every 10 years Mandated by Constitution
U.S. Census Overview
(650 enumerators counted 3,929,214 people at a cost of $44,337)
(500,000 enumerators counted 281,421,906 people at a cost of $4.5 billion)
populations for chronic disease
services to the elderly, poor, children
districts and to assess constituent interests
and population densities
for federal grants.
interest or need
CENSUS 2000 SHORT FORM (SF1)HISPANICS AS A PERCENT OF TOTAL POPULATION
Relationship to Householder
This diagram shows the hierarchical relationships between geographic types.
For example, a line extends from states to counties because a state is comprised of many counties, and a single county can never cross a state boundary.
If no line joins two geographic types, then an absolute and predictable relationship does not exist between them.
For example, many places are confined to one county. However, some places extend over more than one county, such as New York City.
Therefore, an absolute hierarchical relationship does not exist between counties and places, and any tabulation involving both these geographic types may represent only a part of one county or one place.
Notice that many lines radiate from blocks, indicating that most geographic types can be described as a collection of blocks, the smallest geographic unit for which the Census Bureau reports data.
However, only two of these lines also describe the path by which a block is uniquely named. That is, the path through the Block Group.
Two – eight block groups per tract
Smallest area for sample data