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What 80% power means

A test is planned with 80% power for a 10% relative lift. What does that mean?

A.There is an 80% chance that the variant will win the testB.If the true lift is 10%, the test catches it 80% of the timeC.The test will finish in 80% of the time originally plannedD.80% of all visitors in the test will be shown the variant

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What 80% power means

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