This paper deals with the problem of estimating the location parameter of a two parameter exponential distribution in case of contaminated data. Since in this case the sample minimum is an extremely unreliable estimator, robust alternatives are necessary. We investigate two types of estimators...

The advanced maximum-linkage-algorithm (AMLA) is a derivative of the maximum-linkage-algorithm (MLA) given by Zerbst (2001). AMLA produces clusterings which have a good separation between the built classes. To reach the separation, centroids were calculated, which are the basis for...

Im Mess- und Prüfwesen bilden Ringversuche ein Fundament der Qualitätssicherung. Im Mittelpunkt dieses interlaboratoriellen Ringversuchs steht die Messqualität der teilnehmenden Labore. Zudem bietet der Ringversuch die Möglichkeit eines Erfahrungsaustausches, der in einer Verbesserung der...

Wie schon vor einem Jahr wurde die aktuelle Konjunkturprognose (Anfang 1999) in das RWI Klassifikationsschema eingeordnet. Danach liegt die wirtschaftliche Entwicklung des Zeitraums 1998-3 bis 2000-4 im Grenzbereich zwischen Aufschwung und oberem Wendepunkt. Vor einem Jahr war die damalige...

We consider the triangle test with replications, i.e. each assessor is asked repeatedly. A commonly used test statistic for this situation is the sum of all correct assessments, summed over all assessors. Several authors (e.g. o’Mahony, 1982, Brockhoff and Schlich, 1998) argue that the...

In the common nonparametric regression model y(i) = g(ti) + a (ti) ei , i=1….,n with i.i.d - noise and nonrepeatable design points ti we consider the problem of choosing an optimal design for the estimation of the regression function g. A minimax approach is adopted which searches for designs...

Do active vertical mass movements occur within a population of phototropic bacteria in the meromictic Lake Cadagno. An experiment was conducted in vivo to record vertical profiles of the parameters turbidity and temperature in a spatial resolution of 30 cm repeatedly over time. After eliminating...