“…The approximate D-, and equivalently G-, optimal design for the secondorder model was given by Nalimov, Golikova, and 6 (-1, -1), (-1, 1), (1, -1), (0, 0), (0, 1), (1, 0) 144.0 .9667 5.667 7 (-1, -1), (-1, 1), (1, -1), (1, 1), (0, 0), (0, -1), (1, 0) 960.0 .6656 1.407 8 (-1, -1), (-1, 1), (1, -1), (1, 1), 2x(0, 0), (0, 1), (1, 0) 1,664.0 .5218 1.319 9 (-1, -1), (-1, 1), (1, -1), (1, 1), 2x(0, 0), (-1, 0), (0, -1), (0, 1) 3,840.0 .4389 1.100 Mikeshina (1970) and by Atkinson (1973), and the approximate I-optimal design can be readily derived using the approach of Cook and Nachtsheim (1982). The approximate D-, and equivalently G-, optimal design for the secondorder model was given by Nalimov, Golikova, and 6 (-1, -1), (-1, 1), (1, -1), (0, 0), (0, 1), (1, 0) 144.0 .9667 5.667 7 (-1, -1), (-1, 1), (1, -1), (1, 1), (0, 0), (0, -1), (1, 0) 960.0 .6656 1.407 8 (-1, -1), (-1, 1), (1, -1), (1, 1), 2x(0, 0), (0, 1), (1, 0) 1,664.0 .5218 1.319 9 (-1, -1), (-1, 1), (1, -1), (1, 1), 2x(0, 0), (-1, 0), (0, -1), (0, 1) 3,840.0 .4389 1.100 Mikeshina (1970) and by Atkinson (1973), and the approximate I-optimal design can be readily derived using the approach of Cook and Nachtsheim (1982).…”