significance testing

Dada Group Technology

Dec 30, 2022 · Fundamentals

Ensuring Trustworthy A/B Experiments: Architecture, Balance Checks, Log Consistency, Automated Significance Testing, and Result Interpretation

This article discusses how to improve the reliability of online A/B experiments by designing robust architecture, evaluating group balance with orthogonal testing, ensuring consistent front‑end/back‑end logging, automating statistical significance checks, reducing group imbalance, and interpreting results using causal trees.

A/B testingcausal treesdata collection

0 likes · 12 min read

Ensuring Trustworthy A/B Experiments: Architecture, Balance Checks, Log Consistency, Automated Significance Testing, and Result Interpretation

Model Perspective

Nov 17, 2022 · Fundamentals

Can a Stock’s Volatility Remain Unchanged? Applying the Chi‑Square Test for Variance

This article explains how to use a chi‑square test to assess whether a population variance, such as a stock’s monthly return standard deviation, equals a specified constant, detailing hypothesis formulation, test statistic calculation, critical value lookup, and interpretation of results.

chi-square testsignificance testingstatistical inference

0 likes · 3 min read

Can a Stock’s Volatility Remain Unchanged? Applying the Chi‑Square Test for Variance