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    I'm not sure what the expected values would be. In my question it says that the number of peas falling into a certain category should be in the ratio a : b : c : d.

    I am assuming that these are the expected values? The thing that's confusing me is that the experiment is done using X number of eas, and the numbers in a 2 x 2 table, going left to right, are w,x,y and z, and so the observed values would be w/X, x/X, etc, but the expected values would simply be whole numbers?

    I don't really understand this expected values bit. Could someone explain it to me please?

    Thank you

    It sounds to me like you looking at a 2x2 contingency table?
    The expected values are what you'd get if you assumed the variables were independent (i.e. your null hypothesis).
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Updated: March 27, 2011

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