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Thread: Standard Deviation Graph

  1. #1
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    Standard Deviation Graph

    I have the following information about a test:
    The lowest score is 0 and the highest score is 100
    The standard deviation is 12.8
    The average score is 72.2

    I have the results of one of the tests where the person scored a 52.
    How do I make a graph showing this information and how it relates to the individual's score?
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  2. #2
    MHF Contributor
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    Re: Standard Deviation Graph

    sketch a bell curve centered at 72.2

    At 72.2 the curve should be approximately 0.4
    At 72.2 +/- 12.8 both sides should be approximately 0.25
    Both sides should be nearly zero at 72 +/- 2 x 12.8

    I guess then draw a line at 52 from the x axis to the curve.
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