Exact and approximate D-optimal designs in polynomial regression |
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Authors: | Maximilian Happacher |
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Institution: | (1) Institut für Mathematik, Universität Augsburg, Universitätsstr. 14, 86135 Augsburg, Germany |
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Abstract: | If the sample sizen is large enough, then the exact polynomial regression designs obtained by rounding the weights of the approximate D-optimal design to integral multiples of 1/n are D-optimal. This was shown by alaevskiî (1966) and Gaffke (1987). In this note, an efficient algorithm to determine the minimum sample sizen
d for a polynomial model of degreed is derived from a condition given by Huang (1987). Under an additional assumption we show that the conditions of Gaffke and Huang are equivalent; we verify the additional assumption for polynomial degreed40. |
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Keywords: | Approximate and exact designs Legendre polynomials Lagrange interpolation polynomials Hermite interpolation |
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