New PDF release: PDQ Statistics

By Geoffrey R. Norman

ISBN-10: 0585231737

ISBN-13: 9780585231730

ISBN-10: 1550090763

ISBN-13: 9781550090765

This can be an summary of all significant statistical tools, giving the reader an intensive realizing of information and the way they're utilized in study articles. It covers the most important different types - variable and descriptive records, parametic records, non-parametic records, and multivariate information. the reasons are transparent, succinct, and comprise sensible examples. that includes designated examples, titled "Circular Reasoning or Anti-intellectual Pomposity" Detectors (CRAP Detectors), the textual content is helping the reader establish statistical analyses with easy flaws in layout or examine.

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For example, if we are talking about a rating of patient disability, it would be legitimate to ask the degree of disability of the average patient. So if we were to rank order 100 patients, with the "no disability" patients at the bottom and "total disability" patients at the top, where would the dividing line between patient 50 and patient 51 lie? This value, with half the subjects below and half above, is called the median value. For interval and ratio variables, we can use median and modal values, but we can also use a more commonsense approach, that is, simply averaging all the values.

C. Decker Inc. O. D. C. Decker, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from the publisher. ISBN 1-55009-076-3 (Previously published by Mosby-Year Book, Inc. C. Decker Inc. O. C. Decker Inc. O. D. com Japan Igaku-Shoin Ltd. jp South America Ernesto Reichmann, Distribuidora de Livros Ltda. , Europe, Scandinavia, Middle East Blackwell Science Ltd.

P. P. P. P. P. P. P. P. P. P. P. P. P. P. P. Detectors 169 18 Research Designs 171 Types of Research Design 171 Implications for Statistics 174 Appendixes Annotated Bibliography 177 Unabashed Glossary 181 Page 1 PART ONE VARIABLES AND DESCRIPTIVE STATISTICS Page 3 1 Names and Numbers: Types of Variables There are four types of variables. Nominal and ordinal variables consist of counts in categories and are analyzed using "non-parametric" statistics. Interval and ratio variables consist of actual quantitative measurements and are analyzed using "parametric" statistics.

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PDQ Statistics by Geoffrey R. Norman

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