a forester measured 29 of the trees in a large woods that is up for sale. He fou

Question

a forester measured 29 of the trees in a large woods that is up for sale. He found a mean diameter of 10.2 inches and a standard deviation of 4.4 inches. Suppose that these trees provide an accurate description of the whole forest and that a normal model applies b) What size would you expect the central 95% of all tree diameters to be? 1 Using the 6895 99.7 rule, the central 95% of the tree diameters are between inches and inches (Do not round. Type integers or decimals.) c) About what percent of the trees should have diameters below 1.4 inches? Using the 68-95997 rule, about 1% of the trees should have diameters below 1.4 inches. (Do not round. Type an integer or a decimal.) d) About what percent of the trees should have diameters between 19 0 and 23.4 inches? Using the 6-95 997 rule, about 1% of the trees should have diameters between 190 and 234 inches. (Do not round. Type an integer or a decimal.) e) About what percent of the trees should have diameters over 19.0 inches? Using the 68 9599.7 rule, about % of the trees should have diameters over 190 inches. (Do not round. Type an integer or a decimal.) Click to select your answer(s)

Explanation / Answer

b) The 95% confidence interval (1.576,18.82)
c) Answer: 0.02275 = 2.28%
d) Answer: 0.02140 = 2.14%
e) Answer: 0.02275 = 2.28%

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