Class 
mid-points 
in 10 cm. 
Actual 
6242 
Fitted 
2471 
Actual 
Fitted 
3 
45. 56 
39. 58 
41. 64 
37. 64 
4 
23.86 
23.99 
23. 67 
23. 62 
5 
13.23 
14. 53 
13.80 
14. 76 
6 
6. 73 
8. 80 
7.37 
9.21 
7 
4.38 
5. 33 
5. 34 
5. 76 
8 
2.42 
3.23 
2. 67 
3. 60 
9 
1. 53 
1. 96 
2.39 
2.25 
10 
1. 00 
1. 19 
1.46 
1.40 
11 
0. 52 
0. 72 
0. 81 
0. 87 
12 
0.42 
0. 44 
0.49 
0. 55 
13 and 
0. 35 
0.26 
0. 36 
0. 34 
over 
Total 
100 
100 
100 
100 
Table 5. 
Percentages per diameter class for 6242 and 2471 trees 
In table 6 the frequencies are given for both distributions. The logarithmic 
transformation required for fitting caused an underestimation of the total number 
of trees. This may partly be remedied by extending the upper limit of the range. 
The extension was accomplished in this case by re-grouping the trees in 
diameter classes of 30 cm. Both re-grouped distributions were fitted to a 
negative exponential and again highly significant fits were obtained as may be 
seen in table 7. 
N 
Equation 
D. F 
Residual 
Variance 
t 
6242 
log N 
= 4.560182 - 
0.224739 D 
2 
0. 004590 
22.25139 
2471 
log N 
= 4.133425 - 
0.214037 D 
2 
0. 004 6 5 6 
20. 98745 
Table 7. 
Regression equations for diameter distributions in 30 cm classes