Practical nonparametric statistics / W. J. Conover. Conover, W. J. Nonparametric statistics. QA278.8 .C65 1999 519.9 21 COP Includes bibliographical references (p. 474-504) and index. New York : John Wiley, c1999. c1999. 1999 Text viii, 584 p. : eng Wiley series in probability and statistics. Applied probability and statistics section Wiley series in probability and statistics. Applied probability and statistics.