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|11-02-2000, 12:24 AM||#1|
Join Date: Sep 2000
In testing the effectiveness of particular banners (e.g. "Does the red one or the blue one get a better CTR?"), how many impressions should I give each one, to get statistically significant/meaningful percentages?
One of my sponsors mentioned leaving each one up for 3K impressions before making a decision as to keeping or replacing. This is the plan I am generally figuring on, although it is going to take quite some time, as there is a fairly large number of ads involved - around 250 different banners rotating on a site getting a bit over 20K page views per month (and growing slowly). (These are CPC, pay-per-lead, and sales-commission ads from CJ, Linkshare, etc.)
Any differences with regards to comparing different banners from the same sponsor, vs. comparing ads from different sponsors?
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