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Abstract Control calculation ping-pong is the process of iteratively improving a statistical analysis by comparing results from two independent analysis approaches until agreement. We use the daff package to simplify the comparison of the two results and illustrate its use by a case study with two statisticians ping-ponging an analysis ... [Read more...]

Abstract We provide an interpretation for the confidence interval for a binomial proportion hidden as the transcript of an hypothetical statistical consulting session. This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. The markdown+Rknitr source code of this blog is available under a GNU General Public License (... [Read more...]

Abstract If your tap water suddenly becomes brown while authorities claim everything is okay, you start to worry. Langkjær-Bain (2017) tells the Flint Water Crisis story from a statistical viewpoint: essentially the interest is in whether the 90th percentile in a sample of lead concentration measurements is above a certain ... [Read more...]

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Abstract Jugding from recent R-Bloggers posts, it appears that many data scientists are concerned with scraping data from various media sources (Wikipedia, twitter, etc.). However, one should be aware that well structured and high quality datasets are available through state's and country's bureau of statistics. Increasingly these are offered to ... [Read more...]

Abstract As a final post in the baby-names-the-data-scientist's-way series, we use the US Social Security Administration 1910-2015 data to space-time visualize for each the most popular baby name for girls and boys, respectively. The code uses in parts the new simple features package (sf) in order to to get some ... [Read more...]

Abstract We use US Social Security Administration data to compute the probability of a name clash in a class of year-YYYY born kids during the years 1880-2014. This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. The markdown+Rknitr source code of this blog is available under a ... [Read more...]

Abstract Continuing the analysis of first names given to newborns in Berlin 2016, we solve the following problem: what is the probability, that in a school class of size \(n\) of these kids there will be at least two kids having the same first name? The answer to the problem for ... [Read more...]

Abstract Data on the names of all newborn babies in Berlin 2016 are used to illustrate how a scientific treatment of chance could enhance rank statements in, e.g., onomastics investigations. For this purpose, we first identify different stages of the naming-your-baby process, which are influenced by chance. Second, we compute ... [Read more...]

Abstract Carrying the Danish tradition of Juleforsøg to the realm of statistics, we use R to classify the figure content of Kinder Eggs using boosted regression trees for the egg's weight and possible rattling noises. This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. The markdown+Rknitr ... [Read more...]

Abstract We present experiences from organizing a small R hackathon aimed at advancing knowledge and documentation of the R package surveillance. The hackathon was piggybacked on the ESCAIDE2016 conference visited by current and potential package users in the area of infectious disease epidemiology. The output of the hackathon is available ... [Read more...]

\[ \newcommand{\bm}[1]{\boldsymbol{\mathbf{#1}}} \DeclareMathOperator*{\argmin}{arg\,min} \DeclareMathOperator*{\argmax}{arg\,max} \] Abstract We discuss the computation of confidence intervals for the median or any other quantile in R. In particular we are interested in the interpolated order statistic approach suggested by Hettmansperger and Sheather (1986) and Nyblom (1992). In order to ... [Read more...]

Abstract We show how to create cartograms with R by illustrating the population and age-distribution of the planning regions of Berlin by static plots and animations. This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. The markdown+Rknitr source code of this blog is available under a GNU ... [Read more...]

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