Natural enemy ravine revisited: the importance of sample size for determining population growth

Determining the Sample size for Estimation of the CCC-R Control Chart Parameters Based on Estimation Costs

In today's highly competitive industrial environment due to fast technology development, quality practitioners will to detect out-of-control situations and take actions whenever is necessary as soon as possible. Accordingly, new statistical procedures have been enhanced incessantly both to handle high yield processes along with looking for methods of minimizing all quality cost. CCC-r chart, th...

Determining Usability Test Sample Size

Virzi (1992), Nielsen and Landauer (1993), and Lewis (1994) have published influential articles on the topic of sample size in usability testing. In these articles, the authors presented a mathematical model of problem discovery rates in usability testing. Using the problem discovery rate model, they showed that it was possible to determine the sample size needed to uncover a given proportion o...

Natural enemy specialization and the period of population cycles

P. Rohani*, H. J. Wearing, T. Cameron and S. M. Sait Institute of Ecology, University of Georgia, Athens, GA 30602, USA Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK Centre for Biodiversity & Conservation, School of Biology, University of Leeds, Leeds LS2 9JT, UK *Correspondence: E-mail: [email protected] Abstract The dynamical consequences of multiple-speci...

The Importance of Sample Size for Reproducibility of tDCS Effects

The sample size required in importance sampling

The goal of importance sampling is to estimate the expected value of a given function with respect to a probability measure ν using a random sample of size n drawn from a different probability measure μ. If the two measures μ and ν are nearly singular with respect to each other, which is often the case in practice, the sample size required for accurate estimation is large. In this article it is...