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Comment on Google Website Optimizer Case Study: Daily Burn, 20%+ Improvementparent

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But the underlying metric that actually matters, the number of users converted, did actually improve by 21.1%.

I think it's just a matter of using confusing labels to refer to the percentages/improvements.

In other words, you don't really care about the second derivative (the rate at which the conversion rate) is improving as much as you care about the initial rate.

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