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    Hola!
    i'm doing unit 4b on Tuesday but the specimen asks about level of significance:
    'interpret the significance of your calculated value using figure 2'

    figure 2 :
    levels of significance:
    n 0.5 0.1
    12 .506 .712
    14 .456 .645
    16 .425 .601
    18 .399 .564

    from that,how do i work it out?
    n=17 in this case btw.
    I know that if it's aove 0.01 we can be 99% confident in the result and that it didn't occur by chance and 0.05 is only 95% confidence ie 5% likely to have occured by chance but i don;t kow hwoi work it out from that table

    PLEASE help me!??!?!?!
    confuzzled :eek3:
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    (Original post by FestiveReece)
    Hola!
    i'm doing unit 4b on Tuesday but the specimen asks about level of significance:
    'interpret the significance of your calculated value using figure 2'

    figure 2 :
    levels of significance:
    n 0.5 0.1
    12 .506 .712
    14 .456 .645
    16 .425 .601
    18 .399 .564

    from that,how do i work it out?
    n=17 in this case btw.
    I know that if it's aove 0.01 we can be 99% confident in the result and that it didn't occur by chance and 0.05 is only 95% confidence ie 5% likely to have occured by chance but i don;t kow hwoi work it out from that table

    PLEASE help me!??!?!?!
    confuzzled :eek3:

    I thought if it was above 0 then it was strong correlation and below 0 a weak correlation
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    (Original post by TickTackToe)
    I thought if it was above 0 then it was strong correlation and below 0 a weak correlation
    yes but in order to accept or reject our hypothesis,we must compare the critical values and show how strong the relationship between two variable is.

    i don;t know how to go in between teh 18 and 16 without simply guessing.
    i know the answer but not how they came to that answer
    anyone shed some light on this?
    i'm desperate lol.
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    Asking this is the Maths forum would have been a better idea perhaps. But anyway, what did you work out as your value for Spearman's Correlation Co-efficient?
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    (Original post by Mathematician!)
    Asking this is the Maths forum would have been a better idea perhaps. But anyway, what did you work out as your value for Spearman's Correlation Co-efficient?

    OF COURSE!!!!
    IDIOT! LOL
    it didn't even cross my mind......

    the Rs= 0.665 n= 17

    so ithe answer is 0.01 therefore we can be 99% confident in the fact that the positive correlation didn;t occur by chance

    now i'm confused here.
    i just had a maths friend explain it but i'm still a bit sketchy :/

    so,we notice the critical values are decreasing. N=16 is .601 whilst n=18 is .564
    clearly n=17 slots int eh middle. If the Rs must be equal to or greater than the critical value to be significant.
    Obviously, 0.665 is greater than both n=16 and n=18 so it must be greater than nj=17 aswell,meaning we can say that it is of 0.01 significance,yes?

    is it essentially a guessing game of sorts?

    any chance you could explain it to me jsut so i have a concrete knowledge of it?
    thanks in advance...
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    (Original post by FestiveReece)
    OF COURSE!!!!
    IDIOT! LOL
    it didn't even cross my mind......

    the Rs= 0.665 n= 17

    so ithe answer is 0.01 therefore we can be 99% confident in the fact that the positive correlation didn;t occur by chance

    now i'm confused here.
    i just had a maths friend explain it but i'm still a bit sketchy :/

    so,we notice the critical values are decreasing. N=16 is .601 whilst n=18 is .564
    clearly n=17 slots int eh middle. If the Rs must be equal to or greater than the critical value to be significant.
    Obviously, 0.665 is greater than both n=16 and n=18 so it must be greater than nj=17 aswell,meaning we can say that it is of 0.01 significance,yes?

    is it essentially a guessing game of sorts?

    any chance you could explain it to me jsut so i have a concrete knowledge of it?
    thanks in advance...
    First question: Makes sense!

    Second question: It is guess-work in essence.

    Third question: No chance :p: I've forgotten all of this!
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    (Original post by Mathematician!)
    First question: Makes sense!

    Second question: It is guess-work in essence.

    Third question: No chance :p: I've forgotten all of this!

    lol
    thanks anyway!

    i think it'll suffice for what would potetnially be a 2 mark question in a geography exam if it comes up-i hope it will...:rolleyes:
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    (Original post by FestiveReece)
    lol
    thanks anyway!

    i think it'll suffice for what would potetnially be a 2 mark question in a geography exam if it comes up-i hope it will...:rolleyes:
    Best of luck with the exam!
 
 
 

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