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Projections of Education Statistics to 2021

NCES 2013-008
January 2013

Table C.  Mean absolute percentage errors (MAPEs) of projections of number of public elementary and secondary teachers, by lead time: 2012
Statistic Lead time (years)
1 2 3 4 5 6 7 8 9 10
Public elementary and secondary teachers 0.8 1.4 1.7 2.2 2.8 3.4 3.9 4.3 5.0 5.9
NOTE: MAPEs for teachers were calculated from the past 21 editions of Projections of Education Statistics containing teacher projections. Calculations were made using unrounded numbers. Some data have been revised from previously published figures. Number of teachers reported in full-time equivalents.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Projections of Education Statistics, various issues. (This table was prepared March 2012.)

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