Given+a+collection+of+events,+students+will+identify+whether+the+event+is+dependent+or+independent.(

LAUNCH: Students will use the following task to discover if having a facebook account is independent from gender. TASK: 1. Take a class survey of boys and girls who have and do not have facebook. 2. Have student groups create Venn diagrams, tree diagrams, and two-way tables of the results. 3. Students will use the table to find the probability of randomly selecting a boy in the class, and randomly selecting a boy out of those who use facebook in the class. Repeat the process for girls and girls who use facebook.

DISCUSS: 1. According to your findings, are gender and facebook accounts dependent or independent? Explain your reasoning. 2. Discuss whether or not the probabilities between the general and conditional can be different and still be independent.

SOLIDIFY UNDERSTANDING:

1. By looking at P(A), P(A|B), P(B), and P(B|A), students will explain how they can state whether or not two events on a two-way table are dependent or independent.