Confidence
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Confidence means out of transactions already containing Good A, what percentage also contain Good B?
Scenario: Your online drop-shipping store has 100 transactions. Out of all transactions, 50 of them include a hoodie. Of these hoodie transactions, 10 of them include a hat. Find the confidence for "Hoodie ➡ Hat".
Confidence(A ➡ B) = Transactions with A & B / Transactions with A
Transactions with Hoodie & Hat = 10
Transactions with Hoodie = 50
Confidence(Hoodie ➡ Hat) = 10 / 50
Confidence(Hoodie ➡ Hat) = 0.20
Answer: Out of all hoodie transactions in your drop-shipping store, 20% contain a hat.
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Question 1 of 1
1. Question
Your campus coffee shop recorded 25,000 transactions last month. 7,500 of all transactions included a latte. Out of those latte transactions, 3,000 included a bagel (out of 4,000 transactions that included a bagel).
Solve for the confidence of “(Latte) -> (Bagel)”.
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