Healey, Joseph F., 1945- Statistics : a tool for social research / Joseph F. Healey. - 9th ed. - Belmont, CA : Wadsworth/Cengage Learning, c2012. - xxxiii, 526 p. : ill. ; 24 cm. Includes index. ISBN: 9781111186364 (hbk.) 1111186367 (hbk.) Subjects--Topical Terms: Social sciences--Statistical methods.Statistics. Dewey Class. No.: 519.5 / HEA 2012