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Projections of Education Statistics to 2021

NCES 2013-008
January 2013


Table A-3.  Example of constructing mean absolute percentage errors, part 1
Source Year of data
2007 2008 2009 2010
  Enrollment in thousands
Actual 49,293 49,266 49,373 49,484
         
  Projected enrollment, in thousands
Projections of Education Statistics to 2017 49,644 49,825 50,067 50,353
Projections of Education Statistics to 2018 49,470 49,623 49,788 50,034
Projections of Education Statistics to 2019 49,265 49,312 49,386
Projections of Education Statistics to 2020 49,282 49,306
         
  Percentage difference between actual and projected values
Projections of Education Statistics to 2017 0.7 1.1 1.4 1.8
Projections of Education Statistics to 2018 0.4 0.7 0.8 1.1
Projections of Education Statistics to 2019 # -0.1 -0.2
Projections of Education Statistics to 2020 -0.2 -0.4
† Not applicable.
# Rounds to zero.
NOTE: Some data have been revised from previously published figures. Calculations are based on unrounded numbers.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Common Core of Data (CCD), “State Nonfiscal Survey of Public Elementary/Secondary Education,” 2005–06 through 2010–11; and Projections of Education Statistics, various editions. (This exhibit was prepared March 2012.)

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