Review02 - OBSERVED AND TABLE VALUES Notations for scores...

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OBSERVED AND TABLE VALUES Notations for scores and statistics. Sometimes people are mixing two different important things. The first one is the value of our test statistics (the notations used X 2 observed , z observed or X 2 obs , z obs etc.) which we obtained from the data only with the table values that correspond to α level (notations used are X 2 α , z α and z α 2 etc.) That may sound confusing but sometimes we omit subscript when it should be clear form the contents which one we of those two we are talking about. (So we just write X 2 , z etc. for both of them.) Values of the statistic are different for different samples. (That is if I take two samples I will get two different observed values ( X 2 observed or z observed depending on the problem).) On the contrary the table values has nothing to do with the data . They are computed using the table based on the α level that we (choose) specify for our test. For example we know from the table that z 0 . 025 1 . 96 and this number

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This note was uploaded on 01/08/2012 for the course STA 3024 taught by Professor Ta during the Summer '08 term at University of Florida.

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Review02 - OBSERVED AND TABLE VALUES Notations for scores...

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