1. Three hypotheses—ecocide, rat
outbreak, and climate change—are candidates as explanations of why the society
of Easter Island collapsed. Explain each hypothesis, present at least one piece
of evidence for each one, and state a lesson that each hypothesis contains for
the world today. For each hypothesis, write one paragraph of at least four
2. In a paragraph, describe the
seven steps of the scientific method.
3. Error in data analysis often
occurs because the researcher has chosen an inappropriate sample for study—a
sample that does not correctly reflect the characteristics of the population or
phenomenon as a whole. Name at least three different causes of sampling error
and state why each of them can produce invalid data.
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