## The Cambridge Dictionary of Statistics## by B. S. Everitt & A. Skrondal |

I am glad to have this handy reference on my bookshelves. The fourth edition has been revised and expanded; in its present state the book is a reasonably complete collection of definitions, with a good deal of illustrations, examples, formulas and equations where necessary. Also included are short biographies of mathematicians and statisticians who made an impact on the development of theory of probability and statistics. The book also contains descriptions of pertinent software packages. Almost all entries have source references to follow up if so desired.

I emphasize: this is a good and useful book; I have no qualms recommending it to professionals and, more generally, to anyone interested in statistics. However, is the book perfect? No, it is not. It is always a subjective author's call whether to include a particular term in the book or not. I, therefore, would not make an issue of a few terms that have been omitted from the book. There are a few entries, though, that could stand a revision. I'll give a couple of examples.

Sush an important terms as **Median** is only defined for discrete distributions.

The short entry **Extrapolation** is rather generic and sheds no light on the essence of the method; it ends with a puerile warning, *Often a dangerous procedure.*

The entry for **Image Restoration** is pretty brief: *Synonym for segmentation*. This is obviously incorrect. Image restoration is a special discipline; segmentation is a method - one of many - that is often used in image restoration.

To the best of my judgement, such misdefinitions are indeed rare and in-between. If I had to pick an issue with the book it would concern the biographical entries. Most are too short to my liking and offer information, like the school attended or positions held, for which I could not care less. I am more interested in the importance of their contribution to the field. I checked with the companion/competitor Oxford Dictionary of Statistics. This has about the same problem. In both books the biographies are mostly overly concise and rather shallow. May it be an industry standard? On the other hand, the entries have not been entirely reduced to chronological information, so many would disagree with may opinion. For example, a review of the book in the Journal of the American Statistical Association is said to recommend the book to "... anyone interested in statistics. The short biographies alone make it worthwhile."

By the way, each of the two Dicitionaries has terms not included in the other, among biographies in particular. I believe the Cambridge Dictionary might also benefit from inclusion of some statistical tables and a list of notations.

The Cambridge Dictionary of Statistics, Cambridge University Press. 4th edition (October 11, 2010) Hardcover, 478 pp, $59.00. ($37.55 at amazon.com) ISBN 978-0-521-76699-9.

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