There is a 15% chance that a shopper entering a computer store will purchase a computer, a 25% chance they will purchase a game/software, and there is a 10% chance they will purchase both a computer and a game/software.
Create a contingency table for the information.
Game/Software No Game/Software Total Computer No Computer Total What is the probability that a shopper will not purchase a computer and will not purchase a game/software?
What is the probability that a shopper will purchase a computer or purchase a game/software?
What is the probability that a shopper will purchase a game/software given they have purchased a computer?
What is the probability that a shopper will purchase a game/software given they did not purchase a computer?
Does it appear that purchasing a game/software depends on whether the shopper purchased a computer? Or are they independent? Use probability to support your claim.
Lee et al., Math in Society, §4.1 Contingency Tables, Exercise 13