Gravetter, Frederick J. Statistics for the behavioral sciences / Frederick J. Gravetter, Larry B. Wallnau. - 7th ed. - Australia ; Belmont, CA : Thomson/Wadsworth, c2007. - xxi, 759 : ill. ; 27 cm. Includes bibliographical references (p. 750-752) and index. ISBN: 0495095217 LCCN: 2006921607 Subjects--Topical Terms: Psychology--Statistical methods.Educational statistics. LC Class. No.: BF39 / .G72 2007