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This is a hard difficulty Statistics & Math question, commonly asked during Onsite rounds at Meta.

What role is this question designed for?

This question is commonly asked for Data Scientist candidates at Meta during technical interviews.

Control error under multiple testing

Last updated: Mar 29, 2026

Quick Overview

This question evaluates a candidate's understanding of multiple hypothesis testing, sequential monitoring, and error-rate control—specifically familywise error rate (FWER) and false discovery rate (FDR)—when handling correlated primary and secondary metrics in experiments.

hard
Meta
Statistics & Math
Data Scientist

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Control error under multiple testing

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