Freund, John E. Elementary business statistics : the modern approach / John E. Freund, Frank J. Williams - 4th ed. - Englewood Cliffs, N.J. : Prentice-Hal,l 1982 - 606p. : ill. ; 24 cm. Includes index ISBN: 0132531208 LCCN: 81-12103 Subjects--Topical Terms: Commercial statisticsStatistics