The diameter of a tree trunk is an important variable in
forestry. The density curve shown represents the distribution of
diameters in a population of 30-year-old Douglas trees. What is the
probability that when choosing a tree at random it has a
diameter... (Include all the calculations).
1. ...less than 6 inches?
2. ...greater than 8 inches?
3. ...between 2 and 8 inches?
4. ...exactly 4 inches?
5. ...from 0 to 14 inches?
0.03 0.07 0.20 0.33 0.25 0.12 0 2 4 10 12 14 6 8 Diameter (inches)
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