I have a table full of advertising results that looks something like this:
Keyword,Advert,Clicks,Clickthrough Rate
dog,abc,35,2.5%
dog,xyz,40,4.5%
cat,qwe,3,3.4%
cat,rew,22,1.5%
cat,ghj,34,1.7%
fish,hgf,56,4.5%
cow,tyr,22,3.3%
etc.
This data contains the results of trying different adverts to...