This is a better tool with more information provided (in an excel spreadsheet) http://visualwebsiteoptimizer.com/split-testing-blog/ab-testing-significance-cal

This is a better tool with more information provided (in an excel spreadsheet) http://visualwebsiteoptimizer.com/split-testing-blog/ab-testing-significance-calculator-spreadsheet-in-excel/ http://visualwebsiteoptimizer.com/split-testing-blog/ab-test...