Freund, John E. Modern elementary statistics / John E. Freund - 7th ed. - New Jersey : Prentice-Hall, c1988. - xii,574 p. : ill., figs., tabs. ; 25 cm. Includes index. ISBN: 0135935679 Subjects--Topical Terms: Statistics. LC Class. No.: QA276.12 / .F74 1988 Dewey Class. No.: 519.5 / F889m