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stat.ME2024
On the asymptotic distributions of some test statistics for two-way contingency tables
Qingyang Zhang
Pearson's Chi-square test is a widely used tool for analyzing categorical data, yet its statistical power has remained theoretically underexplored. Due to the difficulties in obtai…
stat.ME2024
A note on distance variance for categorical variables
Qingyang Zhang
This study investigates the extension of distance variance, a validated spread metric for continuous and binary variables [Edelmann et al., 2020, Ann. Stat., 48(6)], to quantify th…
stat.ME2024★ 1 cited
On the properties of distance covariance for categorical data: Robustness, sure screening, and approximate null distributions
Qingyang Zhang
Pearson's Chi-squared test, though widely used for detecting association between categorical variables, exhibits low statistical power in large sparse contingency tables. To addres…