Question

Logging in the Rain Forest. “Conservationists have despaired over destruction of tropical rain forest by logging, clearing, and burning.” These words begin a report on a statistical study of the effects of logging in Borneo.12 Charles Cannon of Duke University and his coworkers compared forest plots that had never been logged (Group 1) with similar plots nearby that had been logged one year earlier (Group 2) and eight years earlier (Group 3). All plots were 0.1 hectare in area. Here are the counts of trees for plots in each group: Group1: 27,22,29,21,19,33,16,20,24,27,28,19 Group2: 12,12,15,9,20,18,17,14,14,2,17,19 Group 3: 18,4,22,15,18,19,22,12,12 To what extent has logging affected the count of trees? Follow the four-step process in reporting your work.

Organizing a Statistical Problem: A Four-Step Process

STATE:   What is the practical question, in the context of the real-world setting?

PLAN:   What specific statistical operations does this problem call for?

SOLVE:   Make the graphs and carry out the calculations needed for this problem.

CONCLUDE:   Give your practical conclusion in the setting of the real-world problem.

Answer 1

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