November 2017
Beginner to intermediate
366 pages
7h 59m
English
Content preview from R Data Analysis Projects
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Leverage
How many more units of A and B are expected to be sold together than expected from individual sales? With lift, we said that there is a high association between the {Bag of Organic Bananas} and {Organic Hass Avocado} products. With leverage, we are able to quantify in terms of sales how profitable these two products would be if sold together. The retailer can expect 1.5 more unit sales by selling the {Bag of Organic Bananas} and the {Organic Hass Avocado} together rather than selling them individually. For a given rule A => B:
Leverage(A => B) = Support(A => B) - Support(A)*Support(B)
Leverage measures the difference between A and B appearing together in the dataset and what would be expected if A and B were statistically dependent. ...
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