We have run A/B tests in the past using a 50/50 split, and have used the power prop function for calculating the sample size using the power.prop.test in R. My question is how do I calculate what my sample size should be, if we want to use a 95/5 split or a 90/10 split. This was mentioned in "R - power.prop.test, prop.test, and unequal sample sizes in A/B tests" about using a 95/5 split but was not fully answered, so any detail with examples would be appreciated.
*Edited: Understood let me clarify. The component that was not covered was actual formula for calculating this out, or the R code.
From the linked question: "This is why you need to use power.prop.test because the split doesn't matter. What matters is that you meet the minimum sample size for each group."
How would I go about calculating for each group using power prop test?