This is Dataplot data file LEW3.DAT Tensile strength of concrete H.S. Lew, NIST, January 1976 Response variable = maturity = (temp(F) - 10) * elapsed days ? Number of observations = 26 Number of variables per line image = 3 Order of variables per line image-- 1. Response variable = maturity 2. Factor 1 = elapsed number of days ? 3. Factor 2 = batch (3 levels) To read this data file into Dataplot-- SKIP 25 READ LEW3.DAT Y X SET Maturity Days? Set ------------------------------ 1.844 200 1 2.123 251 1 2.292 292 1 2.507 312 1 2.650 329 1 2.946 386 1 3.123 406 1 3.247 434 1 1.688 151 2 1.988 210 2 2.163 217 2 2.381 257 2 2.525 299 2 2.820 323 2 2.993 382 2 3.117 377 2 3.288 411 2 1.662 113 3 1.872 153 3 2.011 186 3 2.193 244 3 2.318 273 3 2.610 331 3 2.799 363 3 2.932 368 3 3.084 371 3