Probably Not: Table of Contents

Home

Preface

 

 

 

 

1.

AN INTRODUCTION TO PROBABILITY

1

 

Predicting the Future / 1

 

 

Rule Making / 3

 

 

Random Events and Probability / 5

 

 

The Lottery {Very Improbable Events and Large Data Sets} / 10

 

 

Coin Flipping {Fair Games, Looking Backwards for Insight} /13

 

 

The Coin Flipping Strategy that Can’t Lose / 19

 

 

The Prize Behind the Door {Looking Backwards for Insight, Again} / 20

 

 

The Checkerboard {Dealing With Only Part of the Data Set / 22

 

 

 

 

2.

PROBABILITY DISTRIBUTION FUNCTIONS AND SOME BASICS

27

 

The Probability Distribution Function / 27

 

 

Average and Weighted Averages  /32

 

 

Expected Values / 35

 

 

The Basic Coin Flip Game / 37

 

 

The Standard Deviation / 40

 

 

The Cumulative Distribution Function / 48

 

 

 

 

3.

BUILDING A BELL

54

 

 

 

4.

RANDOM WALKS

67

 

The One-Dimensional Random Walk / 67

 

 

What Probability Really Means / 75

 

 

Diffusion / 77

 

 

 

 

5.

LIFE INSURANCE AND SOCIAL SECURITY

82

 

Insurance as Gambling / 83

 

 

Life Tables / 83

 

 

Birth Rates and Population Stability / 90

 

 

Life Tables Again / 91

 

 

Premiums / 94

 

 

Social Security - Sooner or Later? 98

 

 

 

 

6.

BINOMIAL PROBABILITIES

104

 

The Binomial Probability Formula / 105

 

 

Permutations and Combinations / 107

 

 

Large Number Approximations / 109

 

 

The Poisson Distribution / 112

 

 

Disease Clusters / 114

 

 

Clusters / 114

 

 

 

 

7.

PSEUDORANDOM NUMBERS AND MONTE CARLO SIMULATIONS

117

 

Pseudorandom Numbers / 118

 

 

The Middle Squares PSNG / 119

 

 

The Linear Congruential PSNG / 121

 

 

An Arbitrary Distribution Generator / 124

 

 

Monte Carlo Simulations / 126

 

 

A League of Our Own / 132

 

 

 

 

8.

SOME GAMBLING GAMES IN DETAIL

136

 

The Basic Coin Flip Game / 136

 

 

The Gantt Chart / 142

 

 

The “Ultimate Winning Strategy” / 144

 

 

The Game Show / 150

 

 

Parimutuel Betting / 154

 

 

 

 

9.

TRAFFIC LIGHTS AND TRAFFIC

158

 

Outsmarting a Traffic Light? / 159

 

 

Many Lights and Many Cars / 164

 

 

Simulating Traffic Flow / 164

 

 

Simulation Results / 167

 

 

 

 

10.

COMBINED AND CONDITIONAL PROBABILITIES

178

 

Functional Notation / 178

 

 

Conditional Probability / 183

 

 

Medical Test Results / 186

 

 

The Shared Birthday Problem / 189

 

 

 

 

11.

SCHEDULING AND WAITING

192

 

Scheduling Appointments in the Doctor’s Office / 193

 

 

Lunch With a Friend / 199

 

 

Waiting For a Bus / 204

 

 

 

 

12.

STOCK MARKET PORTFOLIOS

208

 

 

 

13.

BENFORD, PORRONDO AND SIMPSON

215

 

Benford’s Law / 215

 

 

Porrondo’s Paradox / 221

 

 

Simpson’s Paradox / 228

 

 

 

 

14.

NETWORKS, INFECTIOUS DISEASES PROPAGATION, AND CHAIN LETTERS

234

 

Degrees of Separation / 235

 

 

Propagation Along the Networks / 238

 

 

Some Other Uses of Networks / 242

 

 

Neighborhood Chains / 249

 

 

 

 

15.

BIRD COUNTING

253

 

A Walk in the Woods / 253

 

 

A Model of Bird Flying Habits / 284

 

 

Spotting a Bird / 259

 

 

Putting It All Together / 261

 

 

 

 

16.

STATISTICAL MECHANICS AND HEAT

267

 

Statistical Mechanics / 268

 

 

Thermodynamics / 276

 

 

 

 

17.

INTRODUCTION TO STATISTICAL ANALYSIS

280

 

Sampling / 281

 

 

Sample Distributions and Standard Deviations / 283

 

 

Estimating Population Average from a Sample / 285

 

 

The Student T Distribution / 288

 

 

Polling Statistics / 290

 

 

Did A Sample Come From A Given Populations / 291

 

 

 

 

18.

CHAOS AND QUANTA

293

 

Chaos / 293

 

 

Probability in Quantum Mechanics / 301

 

 

 

 

 

INDEX

307