Choose tests under non‑normal, unequal variance

Q: How do I approach Statistics & Math interview questions?

Statistics & Math questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master statistics & math interviews.

Q: What difficulty level is this interview question?

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

Q: What role is this question designed for?

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

Question

Choose tests under non‑normal, unequal variance

PracHub · Accepted Answer

This question evaluates understanding of statistical inference for heavy‑tailed, heteroskedastic A/B test metrics, covering CLT conditions for t‑tests, variance‑robust tests, nonparametric and resampling approaches, log transformations and back‑transformation interpretation, and handling zero inflation within the Statistics & Math domain for Data Scientist roles. It is commonly asked because real‑world experimental metrics violate parametric assumptions, so interviewers probe both conceptual understanding of asymptotics and test assumptions and practical application of resampling, transformation, and two‑part modeling choices along with appropriate robustness checks.

Choose tests under non‑normal, unequal variance

Quick Overview

Choose tests under non‑normal, unequal variance

Write your answer