SignifiCalc - tells if a test result is statistically significant at 90%
The SignifiCalc Tool - 90%
       
  Exposure Response Response
  Quantity Rate Index
CONTROL CELL
TEST CELL
Difference Actual  
Difference Needed  
* Significance here is at a 90% level of confidence.   Answer:





Automatic recalculation
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About the SignifiCalc Tool
SignifiCalc enables you to enter the exposure quantities and response rates for a test to find out if the result is statistically significant. (At a 90% confidence level, for example, this means that if you repeated the test 100 times, 90 of them would result in one being higher than the other.) 

TIP: The smartest way to set up your test cells is so that they are all big enough to enable you to conclude that any test that indexes 10 points above or below the Control is statistically significant. That way you'll always know if a result is significant, without having to create a special formula. Elegant yet simple.

To learn in detail about Statistical Significance and Testing, click here.