A survey was designed to study how brook trout populations responded to various
ID: 3057823 • Letter: A
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A survey was designed to study how brook trout populations responded to various levels of urbanization. Urbanization had three levels: low, medium, and high impact. Historical habitats for brook trout were observed, with 200 habitats randomly selected within each level of urbanization, for a total of 600 habitats. Researchers marked each population as extirpated or present. The data are given in the following two-way table. What percent of habitats subject to medium levels of urbanization were found to be present? Extirpated Present Total Low impact 25 175 200 Medium impact 80 120 200 High impact 195 200 40% 25% o 87.5%Explanation / Answer
A survey was designed to study how brook trout populations responded to various levels of urbanization. Urbanization had three levels: low, medium, and high impact. Historical habitats for brook trout were observed, with 200 habitats randomly selected within each level of urbanization, for a total of 600 habitats. Researchers marked each population as extirpated or present. The data are given in the following two-way table. What percent of habitats subject to medium levels of urbanization were found to be present? Extirpated Present Total Low impact 25 175 200 Medium impact 80 120 200 High impact 195 200 40% 25% o 87.5%
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