I have 2 adverts running.
The first advert gets 203 views and 4 people respond. That is 1.97% respond.
The second advert gets 191 views and just 1 person responds. That is 0.52% people respond.
How confident can you be that the 2 adverts will remain to have significantly different response rates in the future?
I have spent probably 4 hours searching the net and looking in my stats book for an answer to this. If anyone could explain how to do this in simple english that would be greatly appreciated.