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A NOTE ON ROTATABILITY
(University of Gothenburg, 1994-10-01)
The need of a measure of rotatability is discussed and exemplified through some examples. The examples also shows the difficulties with measuring rotatability. A graphical technique for exploring the variance function is ...
On monitoring of environmental and other autoregressive processes
(University of Gothenburg, 1998-05-01)
Statistical surveillance is used for monitoring a sequence of data arriving step by step. These techniques have been applied in many places in society and lately the interest and need for rational methods to be used on ...
ABSTRACT BOOTSTRAP CONFIDENCE INTERVALS IN LINEAR MODELS
(University of Gothenburg, 1990-01-01)
A bootstrap method for generating confidence intervals in linear models is suggested. The method is motivated by an abstract nonobservable bootstrap sample of true residuals leading to an observable final result. This means ...
Repeated measurement designs for models with self and mixed carryover effects
(University of Gothenburg, 1998-09-01)
We study the problem of design and analysis of two-period repeated measurement (crossover or changeover) designs based on two or more treatments. In our model we allow the appearance of two types of carryovers (residuals) ...
Sequential probability ratio tests when using randomized play-the-winner allocation
(University of Gothenburg, 1997-01-01)
In many clinical experiments there is a conflict between ethical demands to provide the best possible medical care for the patients and the statisticians desire to obtain an efficient experiment. Play-the-winner allocations ...
STATISTICAL RANK METHODS FOR ORDINAL CATEGORICAL DATA
(University of Gothenburg, 1991-03-01)
The aim of this paper is to present a new rank. method for analysing ordinal scale problems, and to give some of its basic properties. The method is suitable for the assessment of validity and reliability of health measurement ...
Trend-free repeated measurement designs
(University of Gothenburg, 1999-09-01)
The existence and non-existence of trend-free repeated measurement designs are investigated. Two families of efficient / optimal trend-free repeated measurement designs have been identified and methods of construction of ...
Variance estimates based on knowledge of monotonicity and concavity properties
(University of Gothenburg, 1998-08-01)
In problems dealing with regression functions the choice of model and estimation method is due to a priori information about the regression function. In some situations it is motivated to consider regression functions with ...
Exact Semiparametric Inference About the Within-Subject Variability in 2 x 2 Crossover Trails.
(University of Gothenburg, 1992-03-01)
The comparison of primary interest in a 2 x 2 crossover trial typically concerns the effect of the treatments, say A and B, on the mean response level. This article deals with another important aspect, namely the within-subject ...
Monotonicity restrictions used in a system of early warnings applied to monthly economic data
(University of Gothenburg, 1999-04-01)
When making political decisions, the ability to make correct predictions about the behaviour of the business cycle in the future is important. The ability to forecast business cycles determines the success of, for example, ...