Suppossing:
Landing Page A with 1300 leads is achieving a 3% conversion rate Landing Page B with 1500 leads is achieving a 10% conversion rate
First, I want to see if I have achieved enough samples (Leads or conversions) to have a statistically valid test.
Second, I want to confirm that conversion rate for Landing Page B is statistically significant, so better than the obtained for Landing Page A.
How do I determine that the sample of leads and conversions obtained are statistically representative? What would be the minimum sample to get the same success in the conversion ratio?