StatisticsdrillA/B test: relative lift
A statistics problem from Statisticsdrill. Solve it with one answer box, with a fresh sample on every attempt and the worked steps and spreadsheet function in the answer, and it is checked the moment you submit.
The task
In an A/B test of a checkout page, the control (A) converted 236 of 2,000 visitors and the variant (B) converted 253 of 1,800. What is the relative lift of B over A, as a percent of A's rate? A drop is negative. Give the percent rounded to 2 decimal places.
What this problem teaches
Lift = (rate B - rate A) / rate A × 100%. It is relative to the control's rate, not a difference in points.
A hint if you get stuck
Lift = (rate B - rate A) / rate A × 100%. It is relative to the control's rate, not a difference in points.
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