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    Lindam00's Avatar
    Lindam00 Posts: 1, Reputation: 1
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    #1

    Sep 24, 2007, 09:36 AM
    Data analysis
    When working with standard deviation and variance does adding or subtracting 5 to the score affect either one of these?
    smcdanie's Avatar
    smcdanie Posts: 8, Reputation: 1
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    #2

    Sep 24, 2007, 02:19 PM
    Quote Originally Posted by Lindam00
    when working with standard deviation and variance does adding or substracting 5 to the score affect either one of these?
    To one score, or all the scores?

    You may want to create a fake (but small) dataset of 3-4 items and try it out. Use the grades 75, 80, 82, 91. Then compute the SD or Var and then add 5 to one (or all) of the numbers to see if this changes.
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