The reliability of one statistic as compared with another presented 

 in the same or a related table can be judged roughly by its relative 

 magnitude. In general, the large quantities warrant greater confi- 

 dence; the smaller quantities indicate only relative magnitude. 



In determining gross growth the possible sources of error include all 

 of the limitations enumerated under area and volume. Net growth in- 

 cludes in addition the extremely variable factor of mortality. Stand- 

 ard errors of gross and net growth for all species for the block are: 





Percent 1 Million • Million 



: cubic feet; board feet 



Saw-timber and pole 

 trees 

 Gross 



Net i 



: ± 5.8 

 ±11.2 



: ± 8 

 • ±12 





Saw-timber trees : 

 Gross 

 Net 



: ± 7.7 

 : ±17.6 



• ± 4 

 : ± 6 



: ±24 

 : ±35 



Pole trees 

 Gross 

 Net 



• ± 8.4 : 

 : ±10.7 



± 7 

 : ± 8 





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