Wonnacott, Thomas H. Introductory statistics for business and economics / Thomas H. Wonnacott and Ronald J. Wonnacott. - 2nd ed. - New York : Wiley, 1977. - xxii, 753 p. : ill. ; 22 cm. - Wiley series in probability and mathematical statistics. . Includes index. Subjects--Topical Terms: Statistics.