Table 3.

Comparisons between the interpolated tract-level estimates of demographic characteristics for 2007 and the ACS 5-year tract-level estimates for 2005–2009, all U.S. tracts

	Algebraic error							Absolute error
	Mean	SD	Percentiles					Percentiles
			5th	25th	50th	75th	95th	50th	90th
All U.S. census tracts
Total population	−16	594	−840	−247	1	238	753	242	795
Percent female	0.18	4.48	−5.18	−1.75	0.12	1.94	5.39	1.85	5.29
Percent non-Hispanic white	−0.50	6.10	−8.50	−2.92	−0.43	1.89	7.10	2.43	7.86
Percent non-Hispanic black	0.16	4.56	−5.85	−1.03	0.23	1.32	5.68	1.20	5.77
Percent Hispanic	0.25	4.54	−6.17	−1.27	0.43	1.79	6.05	1.58	6.12

SD Standard deviation

Interpolated tract-level estimates of demographic indicators for 2007 are obtained by linearly interpolating between the 2000 Census and 2010 Census

Error is defined as (interpolated estimate) - (reference estimate)