Cover image for Volcanoes
Barrett, Norman S.
Personal Author:
Publication Information:
London ; New York : F. Watts, [1989]

Physical Description:
32 pages : color illustrations ; 26 cm.
Discusses volcanoes and their eruptions, geysers, hot springs, and volcanoes on other planets.
General Note:
Includes index.
Subject Term:
Format :


Call Number
Material Type
Home Location
Item Holds
QE521.3 .B37 1989 Juvenile Non-Fiction Open Shelf

On Order



Although there has been a surge of interest in density estimation in recent years, much of the published research has been concerned with purely technical matters with insufficient emphasis given to the technique's practical value. Furthermore, the subject has been rather inaccessible to the general statistician.The account presented in this book places emphasis on topics of methodological importance, in the hope that this will facilitate broader practical application of density estimation and also encourage research into relevant theoretical work. The book also provides an introduction to the subject for those with general interests in statistics. The important role of density estimation as a graphical technique is reflected by the inclusion of more than 50 graphs and figures throughout the text.Several contexts in which density estimation can be used are discussed, including the exploration and presentation of data, nonparametric discriminant analysis, cluster analysis, simulation and the bootstrap, bump hunting, projection pursuit, and the estimation of hazard rates and other quantities that depend on the density. This book includes general survey of methods available for density estimation. The Kernel method, both for univariate and multivariate data, is discussed in detail, with particular emphasis on ways of deciding how much to smooth and on computation aspects. Attention is also given to adaptive methods, which smooth to a greater degree in the tails of the distribution, and to methods based on the idea of penalized likelihood.

Author Notes

Norman S. Barrett is a prolific author of books for children. Born on August 27, 1935, in London, England, Barrett was educated at St. Catherine's College, Oxford (B.A., 1957; M.A., with honors, 1960). He has written over 100 nonfiction books, some of them under the names of N. S. Barrett, C. J. Norman, and R. J. Stephen.

Barrett credits his background in editing and publishing for giving him the many skills necessary to produce a publisher-ready work. He is capable of doing design, layout, and proofreading, as well as writing and researching. For his popular Picture Library series published by Franklin Watts, which includes a wide variety of subjects for six-to nine-year-olds, he researches, then writes in basic vocabulary that conforms to the page design, and finally has the content authenticated by an expert. The resulting titles range from Astronauts to Monkeys and Apes to Windsurfing, and meet the informational needs of children in both the United States and the United Kingdom.

Before he began writing for juveniles in 1979, Barrett worked as an editor and founded Publicare Ltd., an editorial services firm. He has been a contributor to many sports reference works, such as Purnell's Encyclopedia of Sports, and to many general reference books, including The World of Knowledge Encyclopedia.

Barrett makes his home in London, England.

(Bowker Author Biography)