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Thread: How to calculate if a mean is above chance level

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    How to calculate if a mean is above chance level

    Dear all,

    I have a problem to compare means from two groups with chance level.
    The Variable I want to compare against chance level is calculated like: X=(Var1-Var2)/(Var1+Var2).
    How do I calculate chance level and how can I say if the mean I measured is significant above chance level or not?

    Thank you very much for your help and sorry for my bad english...


  2. #2
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    rogojel's Avatar
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    Re: How to calculate if a mean is above chance level

    could you give a bit more details. It seems that you sample two variables and calculate your X using the values. So, you should have set of X values, and you calculate the mean of that set, right? What is exactly the question you need ro answer?

    Something like, is the real mean X larger the, ( different feom) a given value?


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    hlsmith's Avatar
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    Re: How to calculate if a mean is above chance level

    Yeah, I don't see a mean here unless you are averaging the x variable. Then what mean are you comparing it to?

    Chance level in a mean comparison is typically just your cut-off for the test statistic. So if you say your level of significant (alpha) is 0.05, you just look up that cut-off level for the test statistic given the number of degrees of freedom you have in your test.

    As rog said, just post the question verbatim.
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