This video called Science: It’s a Girl Thing! has been widely criticized for being sexist. What I find even more disturbing is that there is an actual need to dress science and technology up as something they are not. When did kids lose their curiosity?
Ryan McCarthy linked to a post by Ruchir Sharma running on Ezra Klein's blog analyzing global billionaires. It has an accompanying chart, which fails our self-sufficiency test. That test involves erasing raw data from a chart, and figuring out how...
The strategies used in Strategy Diversification in R were labeled as Strategy1 and Strategy2. Strategy1 Indicator: 52 week Simple Moving Average Entry Rule: Buy 1000 shares when price crosses and closes above 52 week Simple Moving Average Exit Rule: Exit all positions when prices crosses and closes below 52 week Simple Moving Average Classification: Long … Continue reading →
Workshop at the University of Wisconsin at Madison, July 11-13. Three full days of doing Bayesian data analysis. See details and registration info here.A list of some previous workshops is here.
In my title I quote George Box, who wrote, “Essentially, all models are wrong, but some are useful“. I wish economists would remember this more often. Statistics and Operations Research (and many other sciences) are based on the concept of … Continue reading →
The Evolution of Music: Stochastic melodies are produced and the “better” ones survive via natural selection. You can listen to the difference between the original random noise and music after 3,060 generations. Thanks to Andrew J’s dad for the ...
From: http://www.stat.fi/org/lainsaadanto/avoin_data_en.htmlStatistics Finland is building ready-made interfaces for the users of open data. The construction of the interfaces has been started from the StatFin database and will be widened to other...
From Friday to Sunday I attended a Philosophy conference on the Foundations for Ockham’s Razor . Fellow bloggers Deborah Mayo (a.k.a. the frequentist in exile) and Cosma Shalizi The conference is organized by Kevin Kelly. Here is a conference photo (due to B. Kliban): Cosma and Deborah are giving blow by blow details on their [...]
I was just thinking about that Yale professor who wrote that book, remember, she screamed at her daughters all the time and didn’t let them go the bathroom while they were practicing piano (violin?), Asian parenting-style etc etc. I was just wondering . . . what if she’d had sons rather than daughters? What are [...]
The assumption of equal variances among the groups in analysis of variance is an expression of the assumption of homoscedasticity for linear models more generally. For ANOVA, this assumption can be tested via Levene's test. The test is a function of ...
A recent article by a former Obama administration official has stirred up debate over the obstacles women face in balancing work/life. This reminded me of this report written by a committee here at Hopkins to help resolve the current gender-ba...
The following is not a Stats Make Me Cry original, but rather something I came across and found very interesting. If you are interested in the topic, please read the preview and follow the link that follows to the original site.It is quite common in po...
No matter what statistical programming language you use, be careful of testing for an exact value of a floating-point number. This is known in the world of numerical analysis as "10.0 times 0.1 is hardly ever 1.0" (Kernighan and Plauger, 1974, The Elements of Programming Style). There are many examples [...]
the Data Hub — The easy way to get, use and share data Welcome to the Data Hub! Find datathe Data Hub contains 3831 datasets that you can browse, learn about and download.Read more....How it worksThis site is running a powerful piece of op...
Note: this is a contributed article for the ICSA Bulletin and the basic idea can be summarized in this picture. It is hard to convince people to think about reproducible research (RR). There are two parts of difficulties: (1) tools used to be for ex...
One of the great research papers of the 20th century celebrates its 60th anniversary in a few weeks time: A quantitative description of membrane current and its application to conduction and excitation in nerve by Alan Hodgkin and Andrew Huxley. Only a...
I like statistics and I struggle with statistics. Often times I get frustrated when I don’t understand and I really struggled to make sense of Krushke’s Bayesian analysis of a split-plot, particularly because ‘it didn’t look like’ a split-plot to … Continue reading →
“Welcome to the Age of Big Data!” The fact that “Big Data, Big Impact” is similar in fields as varied as science and sports, advertising and public health — a drift toward data-driven discovery and decision-making. What is Big Data? “Most of the Big Data surge is data in the wild — unruly stuff like [...]
What’s the difference between statistics and informatics? Q: We always say that statistics is just dealing with data. But we also know that informatics is also getting knowledge from data analysis. For example, bioinformatics people can totally go without biostatistics. I want to know what is the essential difference between statistics and informatics. A: But [...]
Some time ago I read a nice post Solving easy problems the hard way where linear regression is used to solve an interesting puzzle. Following the idea I used rpart to find optimal decision tree sorting five elements.It is well known that...
An easy way to think about priors on linear regression Combining priors and downweighting in linear regression Metropolis Hastings MCMC when the proposal and target have differing support Slidify: Things are coming together fast How to Convert Sweave LaTeX to knitr R Markdown: Winter Olympic Medals Example Testing R Markdown with R Studio and posting it on RPubs.com Announcing [...]
There’s a hot topic concerning official statistics as well as many governmental bodies owning data: open government data OGD. Official statistics in most countries offer open data for years now. But mostly in their own silos and in various flavors: From PDF to XLS and CSV to RDF LOD, in interactive databases like px-web, oecd.stat, …Read More
ONS APPROACH TO OPEN DATAThe Office for National Statistics (ONS), as the UK’s largest producer of official statistics, continues to proactively support the open data agenda both by activities within ONS and within the wider GSS community. We are com...
