The Teasley Stat. Calculator
This is the home of the "World Famous" Teasley Statistical Significance Calculator. The statistical calculator is used by marketers, advertisers, and business owners all over the world to help them analyze their advertising results. Google Adwords users will love it, as will direct marketers of all types.
Do you look at the results of your ad testing and wonder "how certain" you are that one ad is better than the other? Use this tool to calculate whether your click-through or response rates from your tests results are "statistically significant" or not.
To Purchase & Download the Calculator ($49.99) click the "Buy Now" button: 
For a demo & instructions watch This YouTube Video
To examine a non-working version Click Here to Download
The calculator helps you:
- Determine if Your "A vs. B" Test Results are Statistically Significant
- Determine Required Sample Sizes for Advertising Tests
- Calculates Confidence Intervals for "Cost Per Response" Data (New in Version 2!)
- Determine Precise Confidence Intervals
- Examine Graphical Cost-per-response Analysis
- Enter data for up to 15 ads at a time (great for Google Adwords)