Tag Archives: Statistics

Testing, testing . . . .

In his book Bad Science, columnist and psychiatrist Ben Goldacre presents the following simple problem. (I have modified it a bit, but the basic idea is the same.) I have a deck of 100 index cards. On one side of … Continue reading

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Which countries are research giants?

On its news website, the journal Nature recently published a graphic illustrating scientific research activity around the world as measured by the number of papers published from January to October 2011. Nature obligingly arranged the data by country. A glance … Continue reading

Posted in Research, Statistics | Tagged , , , | 1 Comment

Heteroscedasticity

Heteroscedasticity (pronounced — and sometimes spelled — heteroskedasticity) has nothing to do with kinky sex. Sorry about that. It is a statistical term meaning variation in variation. For example, the variation in the weights of elephants is much greater than … Continue reading

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