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Math Help - Errors correlation

  1. #1
    Member princess_anna57's Avatar
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    Errors correlation

    The following statements all contain errors. Identify and explain the error(s) in each case:
    a) There is a moderately weak correlation of r = 0.3 between men's and women's wages in New Zealand.
    b) The correlation between Nick Willis' times for the 1500m and 3000m is a strong r = 1.21
    c) There is an extremely weak correlation of r = -0.94 between the duration of dementia with the degree of cognitive functioning.
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by princess_anna57 View Post
    The following statements all contain errors. Identify and explain the error(s) in each case:
    a) There is a moderately weak correlation of r = 0.3 between men's and women's wages in New Zealand.
    r = 0.3 is very weak.

    Quote Originally Posted by princess_anna57 View Post
    b) The correlation between Nick Willis' times for the 1500m and 3000m is a strong r = 1.21
    -0.999999... < r < 0.9999999...

    Quote Originally Posted by princess_anna57 View Post
    c) There is an extremely weak correlation of r = -0.94 between the duration of dementia with the degree of cognitive functioning.
    r = -0.94 is (at least) a fairly strong correlation (probably categorized as very strong.)

    -Dan
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