Hello STMs!
Hope you are doing well! I need your advice on campaign optimization.
I am doing sweeps with mobile pop traffic. The offer payout is 2.4$. Currently trying to blacklist the placements. Therefore I would like to ask if its the right time to cut the negative placement with a conversion ( 1 conversion but profit is -2x payout (please see the photo below)). Should I get more data on it or should I cut it straight away?


Look up @vortex - I believe he's got exactly what you need in his signature links. Very hulpful 'when to cut placements tutorials and excel tools even. 
here are the vortex ("she" not "he" i believe no?) posts imdutch was referring to:
http://stmforum.com/forum/showthread...Banners-Part-1
http://stmforum.com/forum/showthread...+cut+placement
In answer to this specific question: no, don't cut that placement yet.
Running the numbers through the standard statistical significance tool shows that you're nowhere near statistical significance to cut that placement.
The CVR from your 731 clicks (I assume they're clicks), 1 conversion result could be as low as 0.0001% or as high as 0.65% at this point. That gives you a potential ROI between -100% ROI and +120% ROI from that placement.
One conversion is too little data to cut the placement, keep on going