from Data to Viz (external link)

from data to Viz is a new web site related to data analysis and R. Its aim is to make it easier to choose among different types of data visualisations. It looks beautiful, is easy to navigate, includes “trees” displaying a classification of visualizations and multiple individual examples with the corresponding R code.  Highly recommended!

To access the website and/or to buy the printed poster visit from Data to Viz.

 

Points of significance: P values and the search for significance

Source: Points of significance: P values and the search for significance : Nature Methods : Nature Research

This article discusses an important issue about the use of P-values and complements the articles I linked to last year in posts at this site.

Recommended reading.

The posts from last year were The American Statistical Association Says No to p-values, The American Statistical Association Says [Mostly] No to p-values, The debate continues: “It’s Not The P-values’ Fault”, P-values: the Continuing Saga, and More about P-values: what are the alternatives?

Nature article is wrong about 115 year limit on human lifespan – NRC

 

Leading scientific journal Nature reported on Wednesday about a maximum lifespan for humans. But are their statistics right?

Source: Nature article is wrong about 115 year limit on human lifespan – NRC

 

A small set observations with a few extreme observations plus subjective splitting of a data set into two subsets to be fitted separately to a linear regression model resulted in very clear cut conclusions and striking figures. However, none of this is solid evidence, or evidence at all supporting the paper’s conclusions. This series of articles, not only discusses the problems in the paper, but more importantly, it traces the review process that allowed it to be published in Nature.

A new analysis of the data appears in an article at “Ask a Swiss” but still based on model fitting. They detect a significant change in slope, but still we do not have confidence bands available.