Tuesday, May 26, 2009

In Which I Make a Dumb Mistake

There was a howler of an error in the first edition of How to Lie with Charts (published by Sybex and then reprinted by iUniverse). The error had to do with the defintion of mean, which simply "means" average. However, because the term average is sometimes used loosely to refer to other methods of data reduction, mean is the preferred term in mathematics and statistics.

Quite recently, I found a helpful article on the topic here:

Stapel, Elizabeth. "Mean, Median, Mode, and Range." Purplemath. Available from http://www.purplemath.com/modules/meanmode.htm.

I took pains to clarify and carefully explain the meaning of mean in the Second Edition (LaPuerta).

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