" Exercise 2.2

 Statistical Methods in Biology: Design and Analysis of Experiments and Regression
 by S.J. Welham, S.A. Gezan, S.J. Clark & A. Mead (2014)
 Chapman & Hall/CRC Press, Boca Raton, Florida. ISBN: 978-1-4398-0878-8
 Data from Rothamsted Research (A. Karp)
 Version 1, 16/09/2014 "

" Set working directory - change to location of your data file "
\SET [WORKINGDIRECTORY='d:/stats4biol/data/']

" Read data from working directory "
FILEREAD [NAME='WILLOW.DAT'; IMETHOD=read] FGROUPS=no

" Histogram "
YAXIS WINDOW=1; TITLE='Relative frequency'
XAXIS WINDOW=1; TITLE='Beetle width'
DHISTOGRAM [KEYWINDOW=0; LIMITS=!(1.45,1.5...1.7); LOWER=1.4; UPPER=1.75] DATA=Width; PEN=1

" Sample statistics "
DESCRIBE [SELECTION=mean,median] DATA=Width

" Boxplot "
CALCULATE Mean=MEAN(Width)
BOXPLOT [AXISTITLE='Beetle width'; REFERENCELINE=Mean] DATA=Width


" End of File "