Testing factor–covariate interaction in rank repeated-measures analysis of covariance models

Chunpeng Fan and Donghui Zhang

Communications in Statistics - Theory and Methods, 2018, vol. 47, issue 11, 2760-2778

Abstract: This article derives the asymptotic properties of rank-based tests for the covariate effects in rank repeated-measures analysis of covariance (ANCOVA) models (Fan and Zhang 2017) employing generalized estimating equation (GEE) techniques. One interested application of the proposed tests is to check the validity of the assumption of homogeneous covariate effects in different levels of the factors. Performance of the proposed tests has been confirmed by simulation studies and illustrated using the famous seizure count data. While the article mainly focuses on interaction tests, the scope of the proposed tests includes testing any contrast of the covariate effect such as the null of no overall covariate effect.

Date: 2018
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DOI: 10.1080/03610926.2017.1342840

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