Data Collected:
Tree No. 100 

dbh = 0.81m
Total Ht. = 17 m
Tim. Ht. 2.0m 
Mean Total Ht. for all Roadside Trees is 11.10m 
Calculations:
Tree B/A 
=
(dbh)^{2} / 2
=
(0.81)^{2} / 2
0.51m^{2}

Timber Volume 
= B/A x Tim. Ht.
= 0.52 m^{2} x 2.0m
= 1.03m^{3}

Total Volume 
= 0.59 (Mean Total Ht. x B/A)
= 0.59 (11.10m x 0.52m^{2}
= 3.41m

Branchwood Vol. 
= Total Vol.  Timber Vol.
= 3.41m^{3}  1.03m^{3}
= 2.38m^{3}

% Branchwood Vol. 
= (2.38 / 3.41) x 100
= 70% 
Note: All calculations were carried out using a statistical
package on a computer to a greater degree of accuracy than that implied in the
above calculations. The final results shown are those obtained from the
computer.
Analysis of Variance
The following tests were carried out to find if there were any
differences in dbh, total height and total volume between the trees in
transects 2  6.
Conclusion for tests 1  3: There are significant differences in
dbh, total height and total volume between the 5 transects. Scheff's test was
carried out on the same data in order to identify where the differences lay
(see Section 4.3)
Table 27: Analysis of
Variance of Transect Sample Tree dbh
Due to 
DF 
SS 
MS=SS/SF 
FRatio 
Factor 
5 
1.1540 
0.2308 
6.99 
Error 
509 
16.8072 
0.0330 
Total 
514 
17.9613 


Level 
N 
Mean 
St. Dev. 
1 
141 
0.564 
0.190 
2 
23 
0.547 
0.149 
3 
78 
0.594 
0.211 
4 
107 
0.692 
0.191 
5 
112 
0.628 
0.146 
6 
54 
0.614 
0.175 
Pooled Standard Deviation = 0.182 
Table 28: Analysis of
Variance of Transect Sample Tree Total Height
Due to 
DF 
SS 
MS=SS/SF 
FRatio 
Factor 
5 
800.5 
160.1 
15.06 
Error 
509 
5412.2 
10.6 
Total 
514 
6212.6 


Level 
N 
Mean 
St. Dev. 
1 
141 
11.09 
3.58 
2 
23 
10.43 
2.02 
3 
78 
13.31 
4.13 
4 
107 
14.24 
3.27 
5 
112 
11.94 
2.47 
6 
54 
11.74 
2.75 
Pooled Standard Deviation = 3.26 
Table 29: Analysis of
Variance of Transect Sample Tree Total Volume
Due to 
DF 
SS 
MS=SS/SF 
FRatio 
Factor 
5 
173.34 
34.67 
18.22 
Error 
509 
968.27 
1.90 
Total 
514 
1141.61 


Level 
N 
Mean 
St. Dev. 
1 
141 
1.82 
1.14 
2 
23 
1.55 
0.81 
3 
78 
2.44 
1.61 
4 
107 
3.39 
1.85 
5 
112 
2.31 
1.06 
6 
54 
2.19 
1.27 
Pooled Standard Deviation = 1.38 
© 1987
Robert I. Bradshaw 