Freund, John E. Elementary business statistics : the modern approach / John E. Freund and Frank J. Williams. - 3rd ed. - Englewood Cliffs, N.J. : Prentice-Hall, c1977. - xv, 560 p. : ill. ; 25 cm. Includes bibliography (p. 506-509) and index eng ISBN: 0132530627 Subjects--Topical Terms: Statistics. Dewey Class. No.: 519.5024652 FRE