Question: 8 . On p . 1 1 , it mentions A / B testing TV advertising. On p . 2 3 , it presents a
On p it mentions AB testing TV advertising. On p it presents a table showing cells, namely before vs after adstimes treated vs control markets Could you explain why they couldnt just run the ad on all the markets and see whether the sales differ comparing before and after the ad Namely, why did they need to consider the difference between treated vs control markets?
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