US Census Overview & Descriptive Statistics in SPSS UDP 520 Lab 2 Lin October 11 th, 2007

Outline US Census Using SPSS for descriptive statistics

Part One US Census

The US Census What are the purposes of the US Census? What information does the US census collect? –Short form and long form –How the US census is organized geographically? Where can we get the US census data?

Purposes of the US Census Determine the number of the US house of Representatives of each state Used for the allocation of federal funding for education programs, law enforcement, federal highway projects, aids to farmers, etc.

Information Collected by the US Census Basic demographic: name, sex, race, ethnicity, age, and relationship to head of household, own/rent home Socio-economic :occupation, income, marital status, hours worked, etc. Transportation : means of transportation to work, time of departure to work, travel time to work, vehicle occupancy, vehicles availability, etc Housing : number of bedrooms, property value, real estate taxes, etc.

Short Form and Long Form Short form (Summary File 1 or SF1) –100% data (5 out of 6 households—83%) –Basic demographic: Sex, race, ethnicity, age, relationship to head of household, own/rent home –SF 2—short form data can be “filter” for 249 racial groups (Census 2000) Long Form (Summary File 3 or SF3) –Sample data (1 in 6 households—17%) –All SF1 data plus socio-economic, transportation, and housing data –SF4—long form data can be “filter” for 335 race, ethnicity, and ancestry groups

2000 Census Short and Long Forms Short Form (Summary File 1 or SF1) Long Form (Summary File 3 or SF3)

US Census Geography Primary Divisions Secondary Divisions Nation Place (city/town/CDP) Regions Metropolitan Stat. Area States Primary Metro. Stat. Area Counties Urban Area (1000 per sq. mile & >50000 people) County subdivisions Congressional district Census tracts American Indian Area Block groups 3-Digit or 5-Digit ZIP Code blocks Lowest level of detail SF1—down to blocks SF3—down to block groups

2000 Census First Census to allow person to describe themselves as “more than one-race” First Census translated to 5 languages First Census released “on-line” (1990 data now on the Internet as well) Census 2000 race data are not directly comparable with data from 1990 and previous censuses (the US Census Bureau)

2000 Census on Race & Ethnicity Ethnicity—only two choices –Hispanic or Not Hispanic Race—unlimited choices –White alone –Black or African American alone –American Indian and Alaska Native alone –Asian alone –Native Hawaiian and Other Pacific Islander alone –Some other race alone –Two or more races –Write in

Getting the US Census Data Census website –Tabular file ftp://ftp2.census.gov/census_2000/datasets/ –Boundary shapefile Campus source –WAGDA –CSSCR (restricted to download on campus only)

Some Reports Used Census Data The State of the Nation's Housing Journey-to-Work Trends in the United States and its Major Metropolitan Areas: ftp://ftp.abag.ca.gov/pub/mtc/census2000/JTW_Trends/Report.htm

Part Two Using SPSS for Descriptive Statistics

Obtaining Mean, Median, Standard Deviation, Min, Max in SPSS Analyze  Descriptive Statistics Analyze  Tables  Custom Table