Baseball Handicapping Books
   A Mathematician at the Ballpark by Ken Ross
   Betting Baseball by Michael Murray
   Betting the Bases by Mike Lee
   Betting to Win on Baseball by Robert Ross
   The Physics of Baseball by Robert K. Adair

Football Handicapping Books
   Smart Pro Football Handicapping by Ryan J. Parker
   Beat the Sports Books by Dan Gordon
   How Professional Gamblers Beat the Pro Football Pointspread by J.R. Miller
   Sharp Sports Betting by Stanford Wong
   The Physics of Football by Timothy Gay
   The Unemotional Football Bettor by Scott Kellen

Probability and Statistics Books
   Chance by Amir D. Aczel
   Sportsbetting on the Edge by John C. Tarbet
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Trend Confidence Calculator

 
This tool will allow you to approximate the true probability of an event with a given number of successes and failures for a given confidence level.

These are typically referred to as trends, an often misused statistic.

Simply enter the number of successes and failures below, select the appropriate confidence level, and click the Calculate Trend Confidence button to calculate the true probability interval for the event.
 
Calculator Options
Successes:
Failures:
Confidence Level:

Calculation Results
True probability of success is between 36.89% and 63.11%.
 
Based on 50 successes and 50 failures, there is a 1.00% chance the true probability for the event lies outside of this interval.