Model Perspective
Nov 17, 2022 · Fundamentals
How to Use an F-Test to Compare Stock Return Variances: A Step-by-Step Guide
This article explains the null and alternative hypotheses for one‑ and two‑tailed variance tests, demonstrates how to compute the F‑statistic and critical value, and walks through a practical example comparing the monthly return standard deviations of IBM and HP stocks, concluding that their variances are not significantly different.
F-testhypothesis testingstatistics
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