DATA PLANTS; TITLE 'Ch 8, Exercise 9, PREDICTING PLANT WEIGHT';
INPUT WIDTH HEIGHT WEIGHT TYPE;
*** TYPE 1 = WARM, TYPE 0 = COOL ***;
*** log transform ***;
LWIDTH=LOG(WIDTH); LHEIGHT=LOG(HEIGHT); LWEIGHT=LOG(WEIGHT);
CARDS;
       20.5    13.0      6.840  1
       10.0     6.2      0.400  1
       10.1     5.9      0.360  1
       10.5    27.0      1.385  1
        9.2    16.1      1.010  1
       12.1    12.3      1.825  1
       18.6     7.2      6.820  1
       29.5    29.0      9.910  1
       45.0    16.0      4.525  1
        5.0     3.1      0.110  1
        6.0     5.8      0.200  1
       12.4    20.0      1.360  1
       16.4     2.1      1.720  1
        8.1     1.2      1.495  1
        5.0    23.1      1.725  1
       15.6    24.1      1.830  1
       28.2     2.2      4.620  1
       34.6    45.0     15.310  1
        4.2     6.1      0.190  1
       30.0    30.0      7.290  1
        9.0    19.1      0.930  1
       25.4    29.3      8.010  1
        8.1     4.8      0.600  1
        5.4    10.6      0.250  1
        2.0     6.0      0.050  1
       18.2    16.1      5.450  1
       13.5    18.0      0.640  1
       26.6     9.0      2.090  1
        6.0    10.7      0.210  1
        7.6    14.0      0.680  1
       13.1    12.2      1.960  1
       16.5    10.0      1.610  1
       23.1    19.5      2.160  1
        9.0    30.0      0.710  1
        4.9     7.6      0.420  0
        8.6     4.8      0.580  0
        4.5     3.9      0.080  0
       19.6    19.8      8.690  0
        7.7     3.1      0.480  0
        5.3     2.2      0.540  0
        4.5     3.1      0.400  0
        7.1     7.1      0.350  0
        7.5     3.6      0.470  0
       10.2     1.4      0.720  0
        8.6     7.4      2.080  0
       15.2    12.9      5.370  0
        9.2    10.7      4.050  0
        3.8     4.4      0.850  0
       11.4    15.5      2.730  0
       10.6     6.6      1.450  0
        7.6     6.4      0.420  0
       11.2     7.4      7.380  0
        7.4     6.4      0.360  0
        6.3     3.7      0.320  0
       16.4     8.7      5.410  0
        4.1    26.1      1.570  0
        5.4    11.8      1.060  0
        3.8    11.4      0.470  0
        4.6     7.9      0.610  0