Datalad calculator
Sequential Testing Calculator
If you genuinely cannot wait until the end of a test, this is the honest way to look as you go. It works out the threshold to use at each check so that the whole schedule of looks still adds up to the significance level you claimed, and tells you what that flexibility costs.
1
Your test
Per cent
Per cent, relative
Including the final one
Across both arms
2
What it costs and what it buys
0
users per arm if it runs to the end
0
expected, if the effect is real
0
weeks at most
[…] or Pocock boundaries Set how many times you will look See what it costs and what it buys Open the calculator Free · runs in your browser · no […]