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Table of contents1. What are product sense/business case/metric problems2. 3 categories of questions and frameworks2-1 Diagnose a problem2-2 Measure success2-3 Launch or not1. What are product sense/business case/metric problems2. 3 categories of ques

Table of contentsTipsIt's okay to make mistakes.Interact with the interviewerAlways clarify questionsAsk time to structure your communicationRed flagYou have no idea at allYou have to many ideasFollowing Frameworks BlindlyNot able to defend your selfFacebo

Table of ContentsP_valuePower of a test / statistical powerP_valuehttps://en.wikipedia.org/wiki/P-valueIn null hypothesis significance testing, the p-value is the probability of obtaining test results at least as extreme as the results actually observ

Cracking A/B Testing Problems in DS interviewhttps://towardsdatascience.com/7-a-b-testing-questions-and-answers-in-data-science-interviews-eee6428a8b63power = 1 - (Type 2 error)More samples if sample variance is larger.Less samples if differen

Example of proportion1 ProportionExperiment: test color color of a buttonClick through probability: N(users who clicked) / N(total users)1000 users in both control and treatment groupsResults:Control group: 1.1% CTPTreatment group: 2.3% CTPSign