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Math Help - can this formula be used?

  1. #1
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    can this formula be used?

    Can this formula:



    ...be used for correlation coefficient, when in my exam paper I am given the vaules:


    Sxy Sxx Syy??
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  2. #2
    GAMMA Mathematics
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    Correlation coefficent is equal to: \frac{COV[XY]}{\sigma_x\sigma_y}

    Does that help you?
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  3. #3
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    Quote Originally Posted by colby2152 View Post
    Correlation coefficent is equal to: \frac{COV[XY]}{\sigma_x\sigma_y}

    Does that help you?
    well it does help, its just the forumla that i have posted above is the formula which i am used to using.

    So could i use that formula in any question for correlation coefficient?

    xx
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  4. #4
    GAMMA Mathematics
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    Quote Originally Posted by leaaa View Post
    well it does help, its just the forumla that i have posted above is the formula which i am used to using.

    So could i use that formula in any question for correlation coefficient?

    xx
    Yes, you may use that formula. It is the same one as I provided, but in sum notation. You said that you only have the joint standard deviations though.
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