Refs
References
Chatterji, M. (2003). Designing and using tools for educational assessment. Retrieved September 21, 2008 from http://www.columbia.edu/~mb1434/EdAssess.htm
Hinkle, D.E., Wiersma, W., & Jurs, S.G. (2003). Applied Statistics for the Behavioral Sciences. Boston: Houghton Mifflin Company