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Determine Probability of Friend Request Being Fake

MetaData Scientist · Onsite
EasyData ScientistOnsiteStatistics & Math

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Determine Probability of Friend Request Being Fake evaluates statistical assumptions, formulas, estimation strategy, uncertainty, edge cases, and interpretation in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

Scenario

Probability that an incoming friend request is from a fake account

Question

95% of accounts are real, 5% fake; fake accounts send 10× more friend requests than real ones. If you receive a friend request, what is the probability it is from a fake account?

Hints

Apply Bayes’ theorem: posterior ∝ prior × likelihood.