Projections of Education Statistics to 2014, Thirty-third Edition, September 2005 - Number of years, projection methods, and smoothing constants used to project state-level public school enrollments and high school graduates

Table A13. Number of years, projection methods, and smoothing constants used to project state-level public school enrollments and high school graduates
Projected state variable	Number of years (1972-2002)	Projection method	Smoothing constant¹	Basis for smoothing constant
Grade progression rates	30	Single exponential smoothing	0.4	Empirical research
Graduates/grade 12 enrollment	30	Single exponential smoothing	0.4	Empirical research
¹Alternative smoothing constants were used for the District of Columbia. These smoothing constants were estimated using a feature of the model software program EViews 4.1.
SOURCE: U.S. Department of Education, National Center for Education Statistics, State Public Elementary and Secondary Enrollment Model, 1980-2002, and State Public High School Graduates Model, 1980-81 through 2001-02. (This table was prepared October 2004.)

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National Center for Education Statistics - http://nces.ed.gov
U.S. Department of Education

U.S. Department of Education
Institute of Education Sciences
National Center for Education Statistics