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Evaluation of the Use and Effectiveness of Wildlife Crossings (2008) / Chapter Skim
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Appendix C - Theoretical Background of Network Screening for Proportion Method
Pages 135-136

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From page 135...
... Using Bayes theorem to combine the prior Beta distribution with site-specific collision data (ni, xi) for each site to derive the adjusted posterior beta distribution which can be written as (C9)
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From page 136...
... Once α and β are estimated, μm can be estimated using an Microsoft Excel worksheet function. The posterior parameters, α′ and β′, can be calculated by using equations C10 and C11.
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Key Terms

  • collision type
  • prior distribution
  • beta prior
  • posterior beta
  • pattern score

  • binomial distribution
  • variance using
  • target collision
  • excel function
  • analyzed separately

  • worksheet function
  • calculate variance
  • excel worksheet
  • rural roads
  • expected value

  • distribution using
  • population variance
  • mean proportion
  • posterior parameters
  • using equation

  • calculate parameters
  • microsoft excel
  • score using
  • sample variance
  • combining binomial

  • lane rural
  • roads analyzed
  • posterior distributions
  • using excel
  • adjusted posterior


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