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Oct 15 F Franklin Forest  Washington Forest Oct 15 Field Mice trapped and marked(Initial marked)  20 20Oct 17 Mice trapped   1717Oct 17 Mice trapped (number out of 17)that were already marked  5 15Which population is likely to have a bigger population given the information in the table above.   AFranklin Forest BWashington Forest CCan not tell from the information given DThey are the same size

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Oct 15 F Franklin Forest  Washington Forest Oct 15 Field Mice trapped and marked(Initial marked)  20 20Oct 17 Mice trapped   1717Oct 17 Mice trapped (number out of 17)that were already marked  5 15Which population is likely to have a bigger population given the information in the table above.   AFranklin Forest BWashington Forest CCan not tell from the information given DThey are the same size

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Solution

The Lincoln-Peterson index is a method used to estimate population size. The formula is N = (M*n)/m, where:

  • N is the estimated population size
  • M is the number of individuals initially captured, marked, and released
  • n is the total number of individuals captured in the second sample
  • m is the number of marked individuals recaptured

For Franklin Forest: N = (20*17)/5 = 68

For Washington Forest: N = (20*17)/15 = 22.67

Therefore, Franklin Forest (A) is likely to have a bigger population given the information in the table above.

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