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Math Help - correlation and rank

  1. #1
    Member princess_anna57's Avatar
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    correlation and rank

    In his work with sufferers of Parkinson's Disease, Jared Smith obtained the following data from nine sufferers on the duration of the disease (in years) and its severity (on the Hoehn and Yahr scale of disability):

    Duration 6 1 3.5 1.5 2.5 18 11 8 3
    Severity 2 2 2 2 3 4 3 3 2

    Calculate Spearman's correlation for this data. What does the result imply?
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  2. #2
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    Quote Originally Posted by princess_anna57 View Post
    In his work with sufferers of Parkinson's Disease, Jared Smith obtained the following data from nine sufferers on the duration of the disease (in years) and its severity (on the Hoehn and Yahr scale of disability):

    Duration 6 1 3.5 1.5 2.5 18 11 8 3
    Severity 2 2 2 2 3 4 3 3 2

    Calculate Spearman's correlation for this data. What does the result imply?
    Hello,

    I've attached a table with my calculations.

    The correlation coefficient is rather large. So you can presume that the severity of the disease will increase with it's duration.

    I've only a very limited knowledge (and no experience) with morbus Parkinson, but I guess the duration is only a secondary factor.
    Attached Thumbnails Attached Thumbnails correlation and rank-spearman_parkinson.gif  
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  3. #3
    Member princess_anna57's Avatar
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    Hi there.
    Thank you for your help!
    Earlier today I posted another thread with questions that no one has answered yet. Would you be able to help me with those? I would really appreciate it. Thank you so much! Here's the link: http://www.mathhelpforum.com/math-he...tatistics.html
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