http://www.statisticsviews.com The latest content from StatisticsViews. http://www.statisticsviews.com http://www.statisticsviews.com/details/news/4803011/How-did-2012-Olympics-and-Diamond-Jubilee-impact-UK-economy.html The Office for National Statistics has published an article which takes a retrospective look at the Diamond Jubilee and the London 2012 Olympic and Paralympic Games and how they affected the UK economy.]]> 2013-05-22T10:56:00Z http://www.statisticsviews.com/details/news/4796411/Statisticians-elected-as-members-of-the-Royal-Society.html The Royal Statistical Society has announced that two of their members have been elected members of the Royal Society (RSS News, 14th May 2013).]]> 2013-05-21T12:55:00Z http://www.statisticsviews.com/details/feature/4795851/Can-organic-farming-feed-the-world.html Statisticians have devised some powerful and sophisticated methods for unravelling the implications of their datasets and creating order from the messiness of real world complexity. Paradoxically though, these methods are often most effective when applied to the simplest and most specific questions, but can seem powerless in the face of the larger choices confronting public policy. Ask what factors are associated with forage quality in different polycultures of organic permanent pasture and you can do a...]]> 2013-05-21T10:32:00Z http://www.statisticsviews.com/details/journalArticle/4798821/Identification-of-significant-features-in-DNA-microarray-data.html DNA microarrays are a relatively new technology that can simultaneously measure the expression level of thousands of genes. They have become an important tool for a wide variety of biological experiments. One of the most common goals of DNA microarray experiments is to identify genes associated with biological processes of interest. Conventional statistical tests often produce poor results when applied to microarray data owing to small...]]> 2013-05-21T00:00:00Z http://www.statisticsviews.com/details/news/4788081/Latest-Tutorial-in-Biostatistics-available-to-read-for-free.html A tutorial in biostatistics is now available to download in Early View from Statistics in Medicine, where articles are published online before they are allocated to an issue.]]> 2013-05-20T10:53:00Z http://www.statisticsviews.com/details/journalArticle/4792571/Principal-component-analysis-for-bar-charts-and-metabins-tables.html Abstract In recent years, the analysis of symbolic data where the units are categories, classes, or concepts described by intervals, distributions, sets of categories, and the like becomes a challenging task since many application fields generate complex and massive amounts of data that are difficult to analyze with traditional techniques. In this article, we propose a strategy for extending standard principal component analysis (PCA)...]]> 2013-05-20T00:00:00Z http://www.statisticsviews.com/details/journalArticle/4792561/Flow-field-forecasting-for-univariate-time-series.html Abstract A statistical learning methodology, called flow field forecasting, is presented for predicting the future of a univariate time series. Flow field forecasting draws information from an interpolated flow field of the observed time series to incrementally build a forecast. The time series need not have uniformly spaced observations. Included in the presentation are measures of assessment, a procedure for forecast updating as new...]]> 2013-05-20T00:00:00Z http://www.statisticsviews.com/details/journalArticle/4786131/Exact-inference-for-adaptive-group-sequential-designs.html Methods for controlling the type‐1 error of an adaptive group sequential trial were developed in seminal papers by Cui, Hung, and Wang (Biometrics, 1999), Lehmacher and Wassmer (Biometrics, 1999), and Müller and Schäfer (Biometrics, 2001). However, corresponding solutions for the equally important and related problem of parameter estimation at the end of the adaptive trial have not been completely satisfactory. In this paper, a method is...]]> 2013-05-19T00:00:00Z http://www.statisticsviews.com/details/journalArticle/4786141/Rankbased-principal-stratum-sensitivity-analyses.html We describe rank‐based approaches to assess principal stratification treatment effects in studies where the outcome of interest is only well‐defined in a subgroup selected after randomization. Our methods are sensitivity analyses, in that estimands are identified by fixing a parameter and then we investigate the sensitivity of results by varying this parameter over a range of plausible values. We present three rank‐based test statistics...]]> 2013-05-19T00:00:00Z http://www.statisticsviews.com/details/journalArticle/4786111/Peer-Effects-in-UK-Adolescent-Substance-Use-Never-Mind-the-Classmates.html Abstract This article estimates peer influences on the alcohol, tobacco and cannabis use of UK adolescents. We present evidence of large, positive and statistically significant peer effects in all three behaviours when classmates are taken as the reference group. We also find large, positive and statistically significant associations between own substance use and friends' substance use. When both reference groups are considered...]]> 2013-05-19T00:00:00Z