+ Reply to Thread
Results 1 to 2 of 2

Thread: Appropriate test for two treatment types with zero-inflated data

  1. #1
    Points: 4, Level: 1
    Level completed: 7%, Points required for next Level: 46

    Posts
    1
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Appropriate test for two treatment types with zero-inflated data




    Hello all,

    I am trying to determine if there is a difference in falcon abundance between inside a forest reserve and outside the reserve. I ran several transects inside and outside and corrected for effort. For each transect, I summed the total number of birds observed and divided by effort for a density estimate. The problem I am facing is that for most transects I didn't observe any birds. This creates a problem with running a t-test or an ANOVA. I've also tried running a GLM with poission distribution to correct for my zero-inlfated data. How should I treat these data?

  2. #2
    Omega Contributor
    Points: 38,334, Level: 100
    Level completed: 0%, Points required for next Level: 0
    hlsmith's Avatar
    Location
    Not Ames, IA
    Posts
    6,998
    Thanks
    398
    Thanked 1,186 Times in 1,147 Posts

    Re: Appropriate test for two treatment types with zero-inflated data


    So your dependent variable is counts? If so there are poisson options for zero inflated data, also check out negative binomial regression.
    Stop cowardice, ban guns!

+ Reply to Thread

           




Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats