Campbell MJ, Machin D. Medical Statistics Chichester, England, John Wiley & Sons, 1990, p 393
2.
Colton T. Statistics in Medicine Boston, Little, Brown and Company, 1974, pp 30-31
3.
Greenfield ML , Kuhn JE, Wojtys EM A statistics primer Am J Sports Med24393-395,1996
4.
Hirsch RP, Riegleman RK Statistical First Aid Interpretation of Health Care Data Boston, Blackwell Scientific Publications, 1992, p 22
5.
Kuhn JE, Greenfield ML, Wojtys EM A statistics primer Statistical tests for discrete data Am J Sports Med25585-586, 1997
6.
Remington RD , Schork MA Statistics with Apphcations to the Biological and Health Sciences Second edition Englewood Cliffs, NJ , Prentice-Hall, Inc, 1985, p 15