This is Dataplot data file SNED150.DAT
Snedecor & Cochran Linear Regression Example:
Apple Crop Yield & Wormy Fruit
Question: What linear function relates crop yield
with worm infestation?
Source--Snedecore, George W. and Cochran , William G. (1937).
Statistical Methods. Sixth Edition.
The Iowa State University Press, Ames, Iowa, page 150.
Number of observations = 12
Number of variables per line image = 2
Order of variables on a line image--
1. Response Variable Y = Size of Crop (in hundreds)
2. Factor 1 = Percentage of Wormy Fruits
To read this into Dataplot--
SKIP 25
READ SNED150.DAT Y X
Y X
% Wormy Fruit Size of Crop
---------------------------------
59 8
58 6
56 11
53 22
50 14
45 17
43 18
42 24
39 19
38 23
30 26
27 40