Probability
The resources below were chosen to align with the Clackamas Community College statistics curriculum.
Topic 
Web page 
Video 
Other 
Basic Definitions 
Random circumstance (aka probability experiment, statistical experiment
StatTrek
Simple event (aka outcome or sample point)
StatTrek
Sample space
StatTrek
Event
StatTrek 


Computing Basic Probabilities 
What we mean by probability in this course
StatTrek
Introduction to probability
StatTrek
Overview of how probability is calculated
SurfStat Australia

Sample space, outcomes, events: picking marbles from a bag
Khan Academy
Simple probability: coin flipping, dice rolling, and both at once
Khan Academy
Rolling two dice
Khan Academy

Interactive web page: Rolling two dice
Khan Academy
Interactive web page: Picking balls from a bag
Khan Academy

Introduction to Compound Events 
Helpful overview: basic probabilities, "and", "or", conditional probabilities
onlinestatbook.com

Intro to "and", "or" probabilities: picking from a deck of cards
Khan Academy


Complementary Events 
Complement of an event
StatTrek 


Conditional Probabilities 
Conditional probability definition
StatTrek


Interactive web page: Illustrations of conditional probabilities
onlinestatbook.com

The Multiplication Rule, Independent and Dependent Events 
The multiplication rule
STEPS Project, U of Glasgow
Definition of independent events
StatTrek
Examples of the addition and multiplication rules with diagrams
SurfStat Australia

Deciding if events are independent or dependent
Khan Academy
Example of multiplication rule for independent events: dice rolling
Khan Academy
Example of multiplication rule for dependent events: picking marbles from a bag
Khan Academy

Interactive web page: Practice with dependent probabilities
Khan Academy

The Addition Rule, Mututally Exclusive Events (aka Disjoint Events) 
The addition rule
STEPS Project, U of Glasgow
Definition of mutually exclusive events (aka disjoint events)
StatTrek
Examples of the addition and multiplication rules with diagrams
SurfStat Australia 

Interactive web page: Practice with the addition and multiplication rules
Khan Academy

Summary of Probability Rules 
Complete set of probability rules
StatTrek 


Topic 
Web page 
Video 
Other 