Statistics

The old adage of “Lies, Damned Lies and Statistics” may be true, but I [like] to believe it has more to do with a lack of knowledge and competence than premeditation. Here is what I have learned so far in my quest to avoid spreading “damned lies”.

Graphs and diagrams..

I am continuously amazed at some of the statistics and associated graphs I see in published research. One recent example I saw caught my interest first, when I saw the legend for the stars indicating significance levels.Traditionally, one star is for 0.10; (IF you...

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SNA measures are not like other measures

There is a multitude of measures in social network analysis (SNA). In other social sciences, great lengths are gone to develop robust and valid measures, with discrete validity, which means there are relatively few overlapping constructs; and some remain standard for...

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What topics does your favorite journal publish?

Another day, another use for bibliometric analysis. I was recently at a conference where the editor of AMJ strongly recommended to read the mission statement of a journal before submitting; hitting the target is key to get it considered, and published. There is no...

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Heteroskedasity.. and a good statistics blog

There are many terms in statistics one should know, and most courses assumes one does.. Further, many statistics text books explain these terms mathematically, and in such a way I do not find it conducive to understanding 🙂 the Blog Deeply Trivial covers quite a few...

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The ongoing P-value debate

There are ever more good articles on what p-values are, their use and abuse.. as well as alternatives. Two I have come over today include on article outlining the issue from a journalistic view, showing arguments for and against (in VOX); the second a journal articel...

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What is a “Meta Analysis”

Meta analysis' are often considered the gold standard for studies; a single study is never conclusive due to potential errors in design or data, whereas when results from many studies are systematically analyzed, they can be. Here is a YouTube series that goes through...

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Endogeneity… What it is, and potential sources

Endogeneity has received attention in the past decade, as a significant source of bias in results reported in a wide variety of studies. Papers can now be desk rejected by top journals if there is reason to believe there may be endogeneity at play. Endogeneity refers...

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Some may enjoy reading this..

..and spend a couple of minutes studying the graph. A graph showing what people think of when using unspecific terms like: "some", "a few", "many", as well as various types of probabilities. Rather interesting.. as well as a short discussion on what to do with...

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The futuRe of statistics.. is R…

It is the most up to date software; it will make you more attractive on the job market; and enable you to do any analysis from one program. The two (linked) articles explain why, and give a great list of resources for how to learn, including Coursera : Read more at:...

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The natural selection of bad science

This paper lays out the argument that flawed research design, methods and analysis (all be it unintentional) will yield results in greater volume and that are more novel and surprising; and thus, also greater rate of publishing. As publishing is a key factor in...

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Measurement error and the replication crisis

A common assumption has been that if one finds statistically significant results with noisy data, it means that the findings are conservative. (The intuition is that had there not been strong associations present, they would not have made it through the noise) In...

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How statistics lost their power

Interesting historical perspective, and why statistics as a tool to form policy and public opinion may loose its effect in the time to come. some points: the nation is a misleading entity to use; while some cities flourish and grow, other regions are hit hard; an...

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Statistics tools

Some times, one needs to calculate some statistics, like effect size; not complex, but takes time. Here is a collection of tools to make that easier. http://www.danielsoper.com/statcalc/    

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What statistical software to learn?

There are a range of statistical software packages available, some costly, other free, and some in between. Which to choose? Which to invest time to learn (Blood sweat, tears and frustration) and money to buy? SPSS has it forte in that it has a pretty interface that...

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How politicians poisoned statistics

In this article, Tim Harford uses the distinction put forth by the Princeton philosopher Harry Frankfurt, between those who lie with statistics, and those who simply do not care what the facts are, but use statistics to support their position. The latter can be...

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How well do you see a correlation?

We have all read correlation matrixes, and have seen: As a rule of thumb, the following guidelines on strength of relationship are often useful (though many experts would somewhat disagree on the choice of boundaries). Value of r Strength of relationship 1.0 to -0.5...

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Intro Statistics 9 Dance of the p Values

I use pictures from the ESCI software to give a brief, easy account of the Dance of the p Values. The simulation illustrates how enormously and disastrously variable the p value is, simply because of sampling variability. Never trust a p value! Use estimation, not NHST!

The dance of the p-values

Criticizing the use of p-values has begun to be so common place that it is getting dull repeating it. However, in his class on Moderation and Mediation today, Dominique Muller recommended a YouTube presentation called: “The dance of the P-values”. It puts the...

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The rater in surveys as a source of bias.

As a method of collecting data, surveys have been widely criticized for the biases that are included in the data. When the source of biases are the same for both the dependent and the independent variable, (as in, what is used to explain, and what we are seeking to...

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