### 2009-26

by Graßhoff, U., Doebler, A., Holling, H., Schwabe, R..

**Series:** 2009-26, Preprints

- MSC:
- 62K05 Optimal designs
- 62J05 Linear regression

**Abstract:**

Random coefficients may result in a heteroscedasticity of observations. For particular situations, where only one observation is available per individual, we derive optimal designs based on the geometry of the design locus.

**Keywords:**

optimal design, random coefficient regression, linear mixed model, heteroscedastic linear model, geometry of design locus