180. Extracting release dates from data

Let’s open the chapter about Product Analytics for mobile apps with the analysis of the previous exercise. The goal of the exercise was to estimate the release date of a certain mobile app version.

Such a question “When something appeared for the first time or started to happen?” is very common for many business processes:

  • launch of marketing campaigns
  • product releases
  • bugs (the notion of when the bug was introduced could help to identify the root cause)
  • etc

Usually, we have some sort of dataset with events and their timestamps. Our question “...

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