Rongxin

Rongxin, PhD candidate in Communication

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Is there always a trade-off between accuracy and variance? A short simulation

Sep 2, 2025

There’s one wide-spread statement in statistics and machine learning literature that increased flexibility comes with decreased robustness in the test set. However, is it always true?

Acad | Proof of TSS=ESS+RSS

Aug 19, 2025

Why’s TSS (total sum of squares) equal to ESS (explained sum of squares) plus RSS (residual sum of squares)?

Acad | Proof of useful inequalities in Econometrics

Aug 13, 2025

Markov’s Inequality, Chebyshev’s Inequality, and Cauchy—Schwarz Inequality


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