I have 2 new conversion webpages to test. Leadership recommends 80% traffic to existing conversion webpage and 10% each to the 2 new conversion webpages (non-negotiable)
How do I calculate sample size? I understand the fundamentals of sample size calculation - alpha, power, baseline conversion rate and minimum detectable effect needed but have done it for a 50/50 distribution and 1 treatment only..
I am unsure how to calculate for 2 treatment and uneven distribution. Can anyone guide me or refer me to a calculator or formula?