MARKET BASKET ANALYSIS

1,000 Transaction	Mask 270	Tank 200	Fin 280	Weight 130	Dive Computer 120
Mask	20	20	150	20	50
Tank	20	80	40	30	30
Fin	150	40	10	60	20
Weights	20	30	60	10	10
Dive Computer	50	30	20	10	5
No Additional Prooduct	10	-	-	-	5

Support = P (A&B) Example: P (Fins & Mask) = 150/1000 = .15

Confidence = P (A | B) Example: P (Fins | Mask) = 150/270 = .55556

Lift = P (A | B) / P (A) Example: P (Fins | Mask) /P (Fins) = .55556/.28 = 1.98

Note: P (Mask |Fins) / P (Mask) = 150/280/.27=1.98

1. This is the dive shop that has 1,000 transactions. Input your answer as a decimal to 2 places, example: 0.10

What is the probability that someone will buy a tank?

2. What is the support for buying a tank and fins?

3. What is the support for buying two tanks?

4. What is the confidence for fins, given that a tank has been purchased?

5.What is the confidence for a second tank, given that a tank has been purchased

6. What is the lift for fins, given that a tank has been purchased?

7. What does your answer for question #6 (lift for fins) imply about purchasing these items together?

A. When customer buys a tank, the probability of buying fins as well goes down.

B. When customer buys a tank, the probability of buying fins as well goes up.

C. Something else.

D. Nothing can be implied.

8. What is the lift for a second tank, given that a tank has been purchased?

9. What does your answer for question #8 (lift for second tank) imply about purchasing these items together?

A. When a customer buys a tank, the probability of buying a second tank goes down.

B. When a customer buys a tank, the probability of buying a second tank goes up.

C. Something else.

D. Nothing can be implied.

10.Calculate the Euclidean distance between the points (2,5) and (8,4). Enter your answer as a decimal to two places.

11. Calculate the Euclidean distancebetween the points (2,-1,3) and (8,15,-5).Enter your answer as a decimal to two places.