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I have used apriori to mine roles on a training set and the result is similar to the below

enter image description here

I have been looking around for a kind of validation or measure of such association but it seems pretty vague and there no specific method yet, I come across an opinion which suggests using precision which is defined as TP / TP + FP my questions are

  • is using precision would be a sufficient ?
  • is it correct to assume that ...
    • TP = transactions having both A and B
    • FP = transactions not containing A and B + transcation not containig A + transactions not containing B
  • would I just calculate the coinefidence on the test set ?
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