LinkedIn·Data Scientist·Technical Phone Screen
Jun 2026
LinkedIn data science interview with a stats-heavy question about user behavior on a video platform. Single question but they wanted the full treatment: data slicing, metric definition, test selection, and code. Not a vibe check, they actually wanted to see you work through it.
- A video platform wants to know if users' first uploaded videos tend to be shorter than their later uploads. How would you test this hypothesis? Walk through the data slice, the metric, the statistical test you'd use, and sketch out the SQL or pseudo-code.
“I went straight for a paired t-test comparing first video duration vs.” The rest of the author's notes on Data Scientist interview at LinkedIn, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.
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