1. Population Shift By Stephen Yau, Sarah Lieber, Jaya Bearelly, and Chris Palmer

2. Mean Population If the United States was a tray of weights with each person represented by an equal weight the mean center would be the point at which the map is completely balanced.

3. Median Population The point at which there is an equal number of people to the north and south and to the east and west.

4. Median Center of Population in the U.S. 188039.9584.12 189040.047584.6669 190040.058984.8169 191040.125885.0333 192040.197884.7333 193040.197884.6097 194040.071784.6697 195040.003384.9475 196039.940385.2833 197039.795385.5286 198039.316786.1375 199038.965386.5314 Year Latitude Longitude

6. Median Center of Population Linear Regressions Latitude y = -.0073046154x + 40.29095385 Longitude y =.016327028x + 84.19185513 Predicted Latitude for 2000: 39.4144 Predicted Longitude for 2000: 86.151098

7. Actual Median Center of Population for 2000 is at Washington, Indiana

8. Comparison of Our Predicted With the Actual Median Center of Population We predicted that the latitude in 2000 would be 39.4144. It actually is 38.7. We predicted that the longitude in 2000 would be 86.151098. It actually is 87.2.

9. Images through the decades: Life in 1900

10. Washington DC in 1910

11. Luxurious Living in 1920

12. Slums of the 30’s

13. 18 year old French Canadian Wife of a Potato Farmer in 1940

14. A Couple Mailing a Letter in the 1950’s

15. Native American Home in 1960

16. Sulfur Springs, Colorado in 1970

17. Colorado in 1980

18. Bush Inauguration in 1989

19. Millennium Celebration in 2000 in Washington DC

20. Work Cited www.census.gov www.loc.gov