Hi Everyone,   How can I test for significance using proportions in the following data: Var                 X       Y     Z                  A   50      60     10                 B   100   200    300       If i want to show that the total proportion of Z in A (10/120)  is different from Z in B (300 /600), which test of significance would I use and how would i code it? My data is structured the following way: v1    v2    v3 A      X     50 A      Y     60 A      Z     10 B      X    100 B      Y     200 B      Z     300   I know Chi-sq would compare proportions in all three columns together, but how can i focus the significance test to just Z in A vs Z in B. ... View more