US Census Overview & Descriptive Statistics in SPSS

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

2. Outline • US Census • Using SPSS for descriptive statistics

3. Part OneUS Census

4. 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?

5. 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.

6. 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.

7. 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

8. 2000 Census Short and Long Forms • Short Form (Summary File 1 or SF1) http://www.census.gov/dmd/www/pdf/d61a.pdf • Long Form (Summary File 3 or SF3) http://www.census.gov/dmd/www/pdf/d-61b.pdf

9. US Census Geography Lowest level of detail SF1—down to blocks SF3—down to block groups

10. 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)

11. 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

12. Getting the US Census Data • Census website • Tabular file ftp://ftp2.census.gov/census_2000/datasets/ • Boundary shapefile http://www.census.gov/geo/www/cob/bdy_files.html • Campus source • WAGDA http://wagda.lib.washington.edu/data/type/census/geodb/index.html • CSSCR (restricted to download on campus only) http://julius.csscr.washington.edu/Census2000.htm

13. Some Reports Used Census Data • The State of the Nation's Housing 2007 http://www.jchs.harvard.edu/publications/markets/son2007/index.htm • Journey-to-Work Trends in the United States and its Major Metropolitan Areas: 1960-2000 ftp://ftp.abag.ca.gov/pub/mtc/census2000/JTW_Trends/Report.htm

14. Part TwoUsing SPSS for Descriptive Statistics

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