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Thread: Which test to use for my data

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    Re: Which test to use for my data




    hlsmith mentioned in an earlier post that I should do a Fisher's exact test to analyse my results. Is this not correct test to use to check my null hypothesis?

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    Re: Which test to use for my data

    Then what is your null hypothesis?

    (Well, I thought (when you had told us that there was a distance) that I had suggested a more efficient evaluation. But it is your study!)

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    Re: Which test to use for my data

    What was your evaluation? Sorry, I'm not being funny, I'm quite confused...I thought is was an example of how to do Fisher's using R?? If you could explain your reasoning for the evaluation and how you did it, if not too much trouble?? I have worked out distances for each site in relation to the bird roosting site, you mentioned 'plugging them in' but not sure what you mean by this :-s

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    Re: Which test to use for my data

    Basically, in my report I need to analyse my data (with a p value) to reject or accept hypothesis. I need to tell them which statistical software I used and also put in my appendix the whole calculation that the software gave me...my tutor is nuts about statistics and I really want to get this right.
    Thanks, S

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    Re: Which test to use for my data

    Quote Originally Posted by palmer86 View Post
    What was your evaluation?
    Are you serious?

    Have you not read the above posts that we wrote above to help you?

    Just plug in the correct distance in the code I showed and rerun it again!

    Code: 
    infect    <- c(6 , 6 , 7 , 9 , 14)
    noninfect <- c(44, 44, 43,41 , 36)
    distance  <- c(5 ,  4,  3, 2 ,  1)
    
    mod <- glm(cbind(infect,noninfect) ~ distance, family=binomial)
    summary(mod)

    I must say!!

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    Re: Which test to use for my data

    Yes I am serious
    Like I said, I have no statistical knowledge whatsoever.
    How do I rerun it, on what software??

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    Re: Which test to use for my data

    Quote Originally Posted by palmer86 View Post
    on what software??
    Read it again!

    Here is some R code and results from a logit model:
    (By the way, victor did the cross table and chi-squarred test for you. You could have thanked him!)

  8. The Following User Says Thank You to GretaGarbo For This Useful Post:

    victorxstc (04-22-2013)

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    Re: Which test to use for my data

    This is what comes up in R

    > Type 'contributors()' for more information and
    Error: unexpected string constant in "Type 'contributors()'"
    > 'citation()' on how to cite R or R packages in publications.
    Error: unexpected symbol in "'citation()' on"
    >
    > Type 'demo()' for some demos, 'help()' for on-line help, or
    Error: unexpected string constant in "Type 'demo()'"
    > 'help.start()' for an HTML browser interface to help.
    Error: unexpected 'for' in "'help.start()' for"
    > Type 'q()' to quit R.
    Error: unexpected string constant in "Type 'q()'"
    >
    > > infect <- c(6 , 6 , 7 , 9 , 14)
    Error: unexpected '>' in ">"
    > > noninfect <- c(44, 44, 43,41 , 36)
    Error: unexpected '>' in ">"
    > > distance <- c(5 , 4, 3, 2 , 1)
    Error: unexpected '>' in ">"
    > >
    Error: unexpected '>' in ">"
    > > mod <- glm(cbind(infect,noninfect) ~ distance, family=binomial)
    Error: unexpected '>' in ">"
    > > distance <- c(786, 664, 524, 300, 130)
    Error: unexpected '>' in ">"
    > >

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    Re: Which test to use for my data

    BTW If you read my reply to Victor I did say thanks.

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    Re: Which test to use for my data


    Quote Originally Posted by GretaGarbo View Post
    (By the way, victor did the cross table and chi-squarred test for you. You could have thanked him!)
    Thanks dear Greta
    "victor is the reviewer from hell" -Jake
    "victor is a machine! a publication machine!" -Vinux

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    GretaGarbo (04-22-2013)

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