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Playfair's Commercial and Political Atlas and Statistical Breviary
A scientific revolution began at the end of the eighteenth century with the invention and popularization of the graphic display of data by the remarkable Scot, William Playfair. …
Truth or Truthiness
Teacher tenure is a problem. Teacher tenure is a solution. Fracking is safe. Fracking causes earthquakes. Our kids are over-tested. Our kids are not tested enough. We read claims …
Testlet Response Theory and Its Applications
The measurement models employed to score tests have been evolving over the past century from those that focus on the entire test (true score theory) to models that focus on …
Truth or Truthiness
Teacher tenure is a problem. Teacher tenure is a solution. Fracking is safe. Fracking causes earthquakes. Our kids are over-tested. Our kids are not tested enough. We read claims …