This is Dataplot data file NATR338.DAT Molecular Weight of Dextron (Bacterial Polysaccarides) (Location Shift Example (paired comparison)) Question: Are the 2 chemical methods the same? Source--Natella, Mary G. (1963). Experimental Statistics. National Bureau of Standards Handbook 91. U.S. Government Printing Office. Page 3-38 to 3-40. Number of observations = 16 + 16 = 32 Number of variables per line image = 2 Order of variables on a line image-- 1. Y1 = Response Variable 1 = Molecular Weight via Chem Method 1 2. Y2 = Response Variable 2 = Molecular Weight via Chem Method 2 To read this file into Dataplot-- SKIP 25 READ NATR338.DAT Y1 Y2 T TEST Y1 Y2 LET DEL = Y1-Y2 T TEST DEL 0 Y1 Y2 Molecular Wt. Molecular Wt. Method 1 Method 2 ---------------------------------- 62700 56400 29100 27500 44400 42200 47800 46800 36300 33300 40000 37100 43400 37300 35800 36200 33900 35200 44200 38000 34300 32200 31300 27300 38400 36100 47100 43100 42100 38400 42200 39900