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Concept guidesWhen you can't A/B test: quasi-experiments and holdoutsSenior

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Practice

31 questions
  • Metric diagnosisEngagement on a feature spiked 30% after a release but no one shipped a change to it. What's most likely and where do you start?
  • Metric diagnosisConversion rate dropped, but no engineering changes shipped this week. What ten things are still possible?
  • Metric diagnosisYour retention dropped on a single day three weeks ago and you only just noticed. What do you do?
  • Metric diagnosisYour monthly active users grew 4% but revenue is flat. Walk me through likely causes.
  • Metric diagnosisPageviews dropped while sessions stayed flat. What does that combination mean?
  • Metric diagnosisA weekly KPI moved 2 standard deviations above its mean. What's your read on whether to investigate?
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