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US Population Estimates Opportunities & Challenges

US Population Estimates Opportunities & Challenges

18MAPE of Alternative

18MAPE of Alternative HouseholdPopulation Estimates by CountyMAPE of Alternative Household Population Estimatesby County Size: 2000Size: 20001614Housing Unit Method Component of Change Method Average of 2 Methods121086420Total, allcountiesLess than2,5002,500 to4,9995,000 to14,99915,000 to24,99925,000 to49,99950,000 to99,999100,000 to249,999250,000 to499,999500,000 to999,9991 million ormoreMAPE MAPE is the is mean the mean absolute absolute percent error error defined here as as the sum of of the absolute difference for each county betweenthe 1990 -based householdpopulation the 1990-base estimate household for April 1, 2000 population and Census estimated 2000. for April 1, 2000 and Census 2000.Source: Source: U.S. Census U.S. Census Bureau, Bureau, unpublished unpublished tabulations. tabulations.28

MAPE18MAPE of Alternative HouseholdPopulation Estimates by PercentMAPE of Alternative Household Population Estimates by Percent PopulationChange: 1990 to 2000Population Change: 1990 to 20001614Housing Unit Method Component of Change Method Average of 2 Methods121086420Total, allcounties-10.0 or less -5.0 to -9.9 0.0 to -4.9 0.1 to 4.9 5.0 to 9.9 10.0 to 14.9 15.0 to 24.9 25.0 or morePercent Population Change 1990 to 2000MAPE is the mean absolute error defined here as the sum of the absolute difference for each county between the1990-base household population estimated for April 1, 2000 and Census 2000.Source: U.S. Census Bureau, unpublished tabulations.29

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