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学术科研

Probability & Statistics Seminar

Expected Conditional Characteristic Function-based Measures for Testing Independence

演讲者：Xiangrong Yin（肯塔基大学）
时间：2019-06-13 10:30-11:30
地点：慧园3栋 415报告厅

We propose a novel class of independence measures for testing independence between two random vectors based on the discrepancy between the conditional and the marginal characteristic functions. If one of the variables is categorical, our asymmetric index can be redeemed as the between group dispersion in a kernel ANOVA decomposition and leads to more powerful tests than those relying on symmetric measures. In addition, our index is also applicable when both variables are continuous. We develop two empirical estimates and obtain their respective asymptotic distributions. We illustrate the advantages of our approach by numerical studies across a variety of settings.