Why Use a t-Statistic?
Company: Two Sigma
Role: Data Scientist
Category: Statistics & Math
Difficulty: hard
Interview Round: Technical Screen
Quick Answer: This question evaluates understanding of the t-statistic as a standardized measure for testing whether an estimated effect differs from zero, covering how effect size, variance, and sample size influence the statistic, its relationship to confidence intervals and p-values, and the assumptions and limitations that can make it misleading.