The density of Douglas firs in an old-growth forest is estimated by counting the Douglas firs in four sample plots of 1 hectare each. The number of fir trees in the plots is 10, 12, 7, and 11, respectively. What is the estimated density of firs in the forest?

Question

Quizplus · Accepted Answer

The estimated density of firs in the forest can be found by taking the average number of fir trees per hectare across the four sample plots. 
Average number of fir trees per hectare = (10 + 12 + 7 + 11)/4 = 40/4 = 10
Therefore, the estimated density of firs in the forest is 10 trees per hectare.

The Density of Douglas Firs in an Old-Growth Forest Is