How big should the sample be when evaluating CTR?

Discussion in 'Pay Per Click Advertising' started by pedigreechump6, Aug 30, 2006.

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  1. #1
    I have some campaigns running on Adcenter and some appear to have a poor CTR (as low as 0.5%) but they only have around 200 impressions so far.

    Is this sufficient to conclude that the ad isnt converting well or should I leave it longer?

    Thanks
     
    pedigreechump6, Aug 30, 2006 IP