Wright, Daniel B. Understanding statistics : an introduction for the social sciences / Daniel B. Wright. - London : Sage Publications., c1997. - vii, 228 p. : ill. 24 cm. Includes bibliographical references and index.. ISBN: 0803979185 (pbk) Subjects--Topical Terms: Social sciences--Statistical methods. LC Class. No.: HA29 / .W75 1997 Dewey Class. No.: 519.5