Abstract
References
1.
Fraser
D. A. S.
Nonparametric methods in statistics. New York : Wiley , 1957 .
2.
Kendall
M. G.
Rank correlation methods. (2nd ed. ) New York : Hafner , 1955 .
3.
Kruskal
W. H.
Ordinal measures of association . J. Amer. Statist. Assn , 1958 , 53 , 814 –861 .
4.
Siegel
S.
Nonparametric statistics for the behavioral sciences. New York : McGraw-Hill , 1956 .