The gradient test statistic for outlier detection in generalized estimating equations. (English) Zbl 07878506
Summary: We develop diagnostic tools for estimating equations, useful for the analysis of data with longitudinal structure. The gradient statistic introduced by Terrell (2002) is used to propose a case deletion measure, as well as a statistic for the detection of outlying observations using a mean-shift outlier model. The proposed methodology is illustrated with an example.
MSC:
| 62J20 | Diagnostics, and linear inference and regression |
| 62J12 | Generalized linear models (logistic models) |
| 62P10 | Applications of statistics to biology and medical sciences; meta analysis |
| 62J05 | Linear regression; mixed models |
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