Mathematics Enhancement Programme. (n.d.). http://www.cimt.org.uk/projects/mepres/alevel/alevel.htm
Strait, P. T. (1989). A first course in probability and statistics with applications (2nd ed). Harcourt Brace.
Wackerly, D. D., Scheaffer, R. L., & Mendenhall, W. (2008). Mathematical statistics with applications (7th ed (int. student ed.)). Thomson/Brooks/Cole.
Weiss, N. A. (1997). Introductory statistics (4th alternate ed). Addison-Wesley Pub. Co.
Weiss, N. A., Holmes, P. T., & Hardy, M. (2006). A course in probability. Pearson Addison Wesley.
