STA261-Exam 2 cheat sheet

STA261-Exam 2 cheat sheet - Exam 2 Cheat Sheet Kimberly...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Exam 2 Cheat Sheet Kimberly Glennon-OR use addition; AND use multiplication.- Disjoint events: events that share no simple outcomes in common. A and B are disjoint if they both can’t happen at the same time. No overlap. P(A and B) = 0.- Independent events: two events are independent if the chance that one of the events occurs is unaffected by the occurrence of the other event. Basic Probability Rules-Rule 1: for any event A, P(A) is between 0 and 1.-Rule 2: the sum of the probabilities of all possible outcomes is 1.-Rule 3: the Complement Rule . The probability that an event does not occur is 1 minus the prob that it does occur. P(A) = 1-P(not A). Use in AT LEAST 1 situations, use ands/multiplication in not A part.-Rule 4: the Addition Rule for Disjoint Events is P(A or B)=P(A)+P(B) the General Addition Rule (for NOT Disjoint Events) is P(A or B)=P(A)+P(B) – P(A and B)-Rule 5: the Multiplication Rule for Independent Events. P(A and B)=P(A)*P(B) the General Multiplication Rule. P(A and B) = P(A)*P(B given A). useful when events occur in stages, first P(A and B) = P(A)*P(B given A)....
View Full Document

This note was uploaded on 01/23/2012 for the course STA 261 taught by Professor Beal during the Fall '08 term at Miami University.

Ask a homework question - tutors are online