# exmpl13.1
# A data set from Oehlert (2000) \emph{A First Course in Design and
# Analysis of Experiments}, New York: W. H. Freeman.
#
# Data originally from Scott Smith (personal communication).
#
# Five cycad plants, three fronds per plant.  Three treatments:
# water (control), fungal spores, and horticultural oil. 
# Response is the average change in number of mealybugs
# after 3 days in two 3 cm by 3 cm patches per frond.
# Columns are treatment, plant, and average change.
              trt            plant           change
                1                1             -9
                1                1             -6
                2                1             -4
                2                1              7
                3                1              4
                3                1             11
                1                2             18
                1                2              5
                2                2             29
                2                2             10
                3                2             29
                3                2             36
                1                3             10
                1                3              9
                2                3              4
                2                3             -1
                3                3             14
                3                3             16
                1                4              9
                1                4              0
                2                4             -2
                2                4              6
                3                4             14
                3                4             18
                1                5             -6
                1                5             13
                2                5             11
                2                5             -1
                3                5              7
                3                5             15