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Knowledge Challenge
A friend thinks you can answer this question about Repeat Purchase Rate
A DTC coffee brand has 90-day RPR of 18%. They run two test offers to lift it: (A) 20% off second order, (B) free 30-day subscription trial. Both run for one month with 1,000 customers each. Subscription test has 30% RPR; discount test has 28% RPR. Which test wins?