System Design · Meta · Hard
You are a data scientist in the calling division of a mobile messaging company. The product team wants to launch an adaptive codec that activates under unstable network conditions, hoping to reduce the number of dropped calls. Your responsibility is to design an A/B test for this feature. Address all of the following in your design. (a) Randomization unit. Decide whether to randomize at the caller level, callee level, call-dyad level, or geographic-cluster level. Justify the…
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