Comparison of Given and Calculated number of boards
per tree.
Age of Tree 
Calc # boards 
Given# boards 



20 
1 
1 
40 
6 
6 
60 
16 
N/A 
80 
33 
33 
100 
58 
56 
120 
91 
88 
140 
134 
N/A 
160 
187 
182 
180 
251 
N/A 
200 
326 
320 
 The calculated number of boards per tree versus the given
number of boards per tree are very close. An error analysis can
be made where the absolute value of the calculated number of
boards subtracted from the given number of boards, divided by
the given number of boards all multiplied by a factor of 100.

 %error = 100*ABS( calculated number of boards  given
number of boards) / given # boards
%error 

0 
0 
N/A 
0 
3 
3 
N/A 
2 
 A percent error less than 5% is a good indicator
that the right trendline and equation were chosen in interpolating
the data.
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