SACE Stage 2 Geography Practice Questions - SACE Stage 2 Geography External Assessment Exam

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In a woodland ecosystem sample of 100 individual trees, 70 are Eucalyptus socialis, 20 are Eucalyptus dumosa, and 10 are Acacia pycnantha. Using Simpson's Diversity Index formula D = 1 - [sum(n*(n-1)) / (N*(N-1))], calculate the diversity index D of this sample.

0.463 0.537 0.890 0.120

Correct Answer:

0.463

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