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問題 63 / 65
In the A/B test, the new model's average metric improved but the result was not statistically significant. What is the most appropriate next action to take?
①Deploy the new model to production immediately.
②Discard the new model and continue using the old one.
③Change the evaluation metric and retest.
④Extend the testing period and increase the sample size.
⑤Immediately change the allocation ratios of the test groups.