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Math Help - what is the proof that the corelation coefficent falls between -1 and 1

  1. #1
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    what is the proof that the corelation coefficent falls between -1 and 1[RESOLVED]

    Why must the correlation coefficient for a straight line be -1 \leq r \leq 1
    Last edited by superdude; June 10th 2010 at 02:34 PM. Reason: resolved
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  2. #2
    MHF Contributor matheagle's Avatar
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    This has nothing to do with lines.
    Correlation by the Cauchy-Schwarz inequality is between -1 and 1.
    http://www.aiaccess.net/English/Glos...hy_schwarz.htm
    http://www.aiaccess.net/English/Glos...oefficient.htm
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