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Correlation/Regression

  • …nobody with much experience of medical statistics supposes that the method of multiple correlation (or any other method) carried so far as the available data permit one to carry it, can succeed in isolating the significant factors and only the significant factors.

    Hilda Mary Woods (1892 - 1971)

  • Patient: I'm feeling guilty.  Do you think I was unkind in a past life?

    Psychologist: Well, I can hypnotize you and look for regression to the mean.

    Larry Lesser & Dennis Pearl

  • I just saw a new local band -- on paper, all of its musicians appear to have the same traits, but when they play, they all sounded really different!

    What's the band's name?

    Anscombe's Quartet!

     

    Larry Lesser

  • by Maarten Manhoff (1972 - )

    means that

    as one goes up
    the other comes down

    for example

    when rain comes down
    umbrellas go up.

  • by Andrew Porter

    If something varies normally between two far extremes,
    It usually swings back naturally to values in between.
    From sport to crime and illnesses, we see this common theme,
    An effect we call, statistically, 'regression to the mean'.

    When Brucie plays his cards right and he's holding up a queen,
    You know that next a lower card is likely to be seen,
    Because there are so many cards much lower than a queen.
    It's simple probability, it's 'regression to the mean'.

    Random fluctuations of performances in sports,
    Befuddle sports professionals, who use gimmicks of all sorts,
    Crystals, magnets, copper bracelets they esteem,
    But improvements in achievement are 'regression to the mean'.

    A man with awful backache, that sometimes gets much worse,
    May turn to herbal remedies and swear his pain's reversed.
    Perhaps it has, but not because the herbalist intervened,
    The pain will ease quite simply through 'regression to the mean'.

    Evidence-based treatments that doctors should assign,
    Use tests that will be randomized, controlled and double-blind,
    Stopping self-deception before those test-results are seen,
    It stops them being fooled by 'regression to the mean'.

    Go to the author's original site

  • By Elizabeth Stasny

    Fitting a straight line?
    Be sure to check assumptions,
    Plot residuals.

    Your plot shows a curve?
    Try a polynomial:
    x² or x³

    Partitioning the
    SSE or SSR - -
    Partial Sums of Squares.

  • How did the statistician study the new device for measuring the weight of trees?

    He used the log scale.

    Bruce White

  • How do car manufacturers study trends in sales?

    They use autocorrelation.

    Bruce White

  • Cancer has been linked to nitrites in processed red meats like sausages. And sausages have been found linked to....other sausages.

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