All rights reserved. Printed in the United States of America. No part of this pub- lication may be reproduced or transmitted in any form or by any means, elec- tronic or mechanical, including photocopy, recording, or any information stor- age and retrieval system, without permission in writing from the publisher. Copyright © 2000 by Westview Press, A Member of the Perseus Books Group Published in 2000 in the United States of America by Westview Press, 5500 Cen- tral Avenue, Boulder, Colorado 80301-2877, and in the United Kingdom by Westview Press, 12 Hid's Copse Road, Cumnor Hill, Oxford OX2 9JJ Find us on the World Wide Web at www.westviewpress.com Library of Congress Cataloging-in-Publication Data Berry, William Dale. Understanding multivariate research : a primer for beginning social scientists / William D. Berry, Mitchell S. Sanders. p. cm. Includes bibliographical references and index. ISBN 0-8133-9971-8 (pbk.) 1. Social sciences -- Research -- Methodology. 2. Multivariate analysis. 3. Regression analysis. I. Sanders, Mitchell S. II. Title. III. Series. H62 .B454 2000 300'.7'2 -- dc21 99-057762 The paper used in this publication meets the requirements of the American National Standard for Permanence of Paper for Printed Library Materials Z39.48-1984. 10 9 8 7 6 5 4 3 2 1 -iv- |