Testing Banners? - geek/talk: Signature-free discourse for serious web publishers

wsz · 11-02-2000, 12:24 AM

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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11-02-2000, 12:24 AM	#1
wsz Registered User Join Date: Sep 2000 Posts: 614	Testing Banners? 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? ------------------ Web Sponsor Zone - Internet Advertising Directory http://www.websponsorzone.com Earn Money With Your Site

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