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Projections of Education Statistics to 2020

NCES 2011-026
September 2011


Table A-3.  Example of constructing mean absolute percentage errors, part 1

Source Year of data
2005 2006 2007 2008
  Enrollment, in thousands
Actual 49,113 49,316 49,293 49,265
  Projected enrollment, in thousands
Projections of Education Statistics to 2016 49,028 49,370 49,610 49,812
Projections of Education Statistics to 2017 49,464 49,644 49,825
Projections of Education Statistics to 2018 49,470 49,623
Projections of Education Statistics to 2019 49,265
         
  Percentage difference between actual and projected values
         
Projections of Education Statistics to 2016 -0.2 0.1 0.6 1.1
Projections of Education Statistics to 2017 0.3 0.7 1.1
Projections of Education Statistics to 2018 0.4 0.7
Projections of Education Statistics to 2019 #
† Not applicable.
# Rounds to zero.
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 2008–09; and Projections of Education Statistics, various editions. (This table was prepared January 2011.)

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