I have the following problem,
I am trying to estimate the conversion rate of product sales online, my data is simple,
I have the number of clicks and the number of sales for each product.
Sales are sparse so there are few sales per product. how can I estimate the upper and lower bound of the error on each product?
For example, if I have 21 clicks and 1 sale, the conversion rate is 1/21=0.07, I want to be able to add a lower and upper bound on the error of this estimation.
Thank you