I am a software designer by trade and I am working on a project for a client, and I would like to make sure that my analysis is statistically sound.
Consider the following: We have n advertisements (n < 10), and we simply want to know which ad performs the best. Our ad server will randomly serve one of these ads. Success is if the a user clicks on the ad -- our server keeps track of that.
Given: Confidence Interval: 95%
Question: What is the estimated sample size? (How many total ads must we serve), Why? (remember i am a dummy)