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Google DS A/B Testing Interview Questions

Still interviewing for a Google DS role, but here are some A/B testing interview questions I got. Nothing too complex fortunately, but good concepts to review.

In AB testing, if there are two features or methods, how do you decide which one is better?
What are some things you want to be aware of in performing AB Testing?
In AB testing, how do you choose a sample size?
In AB testing, what is the relationship between power and sample size?
In AB testing, what type of statistical test do you use? What are some test statistics? How do you calculate a confidence interval?
When AB testing, what are some test metrics you use?

Good luck to anyone else interviewing!

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Thanks for sharing - these are very helpful