Carers are central to the effective support of people affected by cancer. Little is known however about the specific support needs of carers of military personnel. This study aimed to determine the supportive care needs of unpaid carers within British Forces (including military/civilian personnel, their families and dependent adults) currently stationed in Germany. Qualitative semi-structured i...

Finite point percentile estimates of Demos and Sentana (1998) and Andrews (2001) deviance statistics are determined for the case of fitting a null of a random walk and the parameters lie on the boundary against the alternate univariate (G)ARCH(1, 1) and the likelihood maximising parameter set Ω possibly lie in the adjacent neighbourhood. We present a way to adjust the asymptotic critical value ...

A sample size calculation for logistic regression involves complicated formulae. This paper suggests use of sample size formulae for comparing means or for comparing proportions in order to calculate the required sample size for a simple logistic regression model. One can then adjust the required sample size for a multiple logistic regression model by a variance inflation factor. This method re...

Exact power and sample size calculation for bioequivalence studies with high order crossover designs using statistical software nQuery are presented. Such calculation can be very easily performed, and thus provides a convenient tool for practical usage.

Designs of the double sampling (DS) X chart are traditionally based on the average run length (ARL) criterion. However, the shape of the run length distribution changes with the process mean shifts, ranging from highly skewed when the process is in-control to almost symmetric when the mean shift is large. Therefore, we show that the ARL is a complicated performance measure and that the median r...

BACKGROUND Central to the design of a randomised controlled trial is the calculation of the number of participants needed. This is typically achieved by specifying a target difference and calculating the corresponding sample size, which provides reassurance that the trial will have the required statistical power (at the planned statistical significance level) to identify whether a difference of...

In clinical research, parameters required for sample size calculation are usually unknown. A typical approach is to use estimates from some pilot studies as the true parameters in the calculation. This approach, however, does not take into consideration sampling error. Thus, the resulting sample size could be misleading if the sampling error is substantial. As an alternative, we suggest a Bayes...

In this article, we consider distributed stochastic optimization over randomly switching networks, where agents collaboratively minimize the average of all agents’ local expectation-valued convex cost functions. Due to stochasticity in gradient observations, distributedness functions, and randomness communication topologies, algorithms with an exact convergence guarantee under fixed step-sizes ...

The control chart based on geometric distribution (geometric chart) has been shown to be competitive to por npcharts for monitoring proportion nonconforming, especially for applications in high quality manufacturing environment. However, implementing a geometric chart often assumes the process parameter to be known or accurately estimated. For a high quality process, an accurate parameter estim...