Here is Market Basket data for 1,000 transactions at a Drug Store.Use the table below to answer the following questions.

-Refer to the table above.What is the definition of support for Drug A and Drug B?
A)The probability that Drug A will be purchased.
B)The probability that Drug B will be purchased.
C)The probability that both Drug A and Drug B will be purchased.
D)The probability that Drug A will be purchased given that Drug B has been purchased.
E)The probability that Drug B will be purchased given that Drug A has been purchased.

Question

Here is Market Basket data for 1,000 transactions at a Drug Store.Use the table below to answer the following questions.
 
-Refer to the table above.What is the definition of support for Drug A and Drug B?
A)The probability that Drug A will be purchased. 
B)The probability that Drug B will be purchased. 
C)The probability that both Drug A and Drug B will be purchased. 
D)The probability that Drug A will be purchased given that Drug B has been purchased. 
E)The probability that Drug B will be purchased given that Drug A has been purchased.

Quizplus · Accepted Answer

Support is the proportion of transactions that contain both Drug A and Drug B. Therefore, the definition of support for Drug A and Drug B is the probability that both are purchased together. Choice A and B are incorrect because they only refer to the probability of one drug being purchased. Choice D and E are incorrect because they refer to conditional probabilities, which are not relevant to the definition of support.

Here Is Market Basket Data for 1,000 Transactions at a Drug