Sampling And Statistics
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About sampling forest data
Estimations from plot sample data
Assume we have sampled n plots from a treatment unit (stand) with area A and that we want to estimate some stand variable Y, given as a value per area unit Ysub(ha). Then the estimated value of Y is
where
estimated value in plot i, and
inventoried area of plot i
To get the total value for the stand, we simply multiply with A (assuming that A is known):