1This is Dataplot data file NATR627.DAT 2Cubic Polynomial Regression Example 3Question: What cubic polynomial relates Y to X? 4 5Source--Natella, Mary G. (1963). Experimental Statistics. 6 National Bureau of Standards Handbook 91. 7 U.S. Government Printing Office. Page 6-27 to 6-42. 8 9Number of observations = 7 10Number of variables per line image = 2 11Order of variables on a line image-- 12 1. Response Variable Y = response 13 2. Factor 1 X = factor 1 14 15To read this file into Dataplot-- 16 SKIP 25 17 READ NATR627.DAT Y X 18 CUBIC FIT Y X 19 20 21 22 23 24 Y X 25------------ 26 3.4 10 27 11.7 20 28 37.2 30 29 80.1 40 30151.4 50 31253.2 60 32392.6 70 33