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Math Help - correlation coefficient

  1. #1
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    correlation coefficient

    Ok I was required too work out the Correlation Coefficent and I have done that and corrected it too 3 d.p as the question asks but it also asks for me too comment on the figure and I have put that following comment;

    "The Correlation Coefficient is 0.887 corrected to 3dp and looking at this figure this shows that there is a strong positive correlation"

    Do you think that is a suitable comment?
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  2. #2
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    Quote Originally Posted by Swift View Post
    Ok I was required too work out the Correlation Coefficent and I have done that and corrected it too 3 d.p as the question asks but it also asks for me too comment on the figure and I have put that following comment;

    "The Correlation Coefficient is 0.887 corrected to 3dp and looking at this figure this shows that there is a strong positive correlation"

    Do you think that is a suitable comment?
    There's probably more to say. Read this: Statistics 2 - Correlation Coefficient and Coefficient of Determination
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  3. #3
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    Ok thanks for that reading it I think this makes a bit more sense and talks about it a bit more;

    As both the x & y values have strong positive linear correlation this has an affect on the correlation cofficient resulting in the correlation cofficient also having a strong positive correlation because 0.88+ usually represents a high positive correlation.

    Hope that makes sense :P it does too me but that doesn't mean anything....

    Cheers,
    Sw!ft.
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  4. #4
    MHF Contributor matheagle's Avatar
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    the corr coeff is between -1 and 1
    think of both as 100 percent related, like y=-x and y=x.
    Zero is similar to independence (they are the same in the normal setting)
    the closer to -1 or 1 the more one variable explains the other.
    Near 0 means that neither can 'predict' the other.
    Now, near zero, near -1, 1 is dependent on your alpha in a testing setting.
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