Statistical Education Resource Kit

Probability Rules and Expected Value Examples

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Table of Contents

Multiplication Rules in Probability Expected Value Examples 

Swedish Parking Example 

Ticketed driver claims 

Multiplication Rule 

The defendant’s calculation 

A Family Planning Strategy 

Probabilities for each outcome 

Probability distribution number of boys 

Expected value: The long run mean 

Number of boys per family 

Distribution of girls per family 

Girls per family 

“Average” Family 

The Basic Principle 

A roulette wheel 

Bet $1 on a number 

Expected value of the bet 

Fair Game Definition 

Bet $1 on Black Number 

Expected value of bet on black

Author: Bob Heckard 

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This web page was submitted by Bob Heckard: rho@stat.psu.edu