On Business Statistics

HyperStat Online Textbook (http://davidmlane.com/hyperstat/contents.html)
SurfStat statistical tables (http://www.anu.edu.au/nceph/surfstat/surfstat-home/tables/normal.php)
See also: SurfStat.Australia: an online text in introductory Statistics.
Student's t Distribution (http://www.econtools.com/jevons/java/Graphics2D/tDist.html)
This applet allows you to adjust the degrees of freedom of the t distribution (drag the slider) to see how it compares to the standard normal. The 5% two-tailed critical values are displayed for both distributions.
Java Applets for Visualization of Statistical Concepts. (http://www.kuleuven.ac.be/ucs/java/index.htm)
Seeing Statistics Normal Probability Calculation Demonstrations from Seeing Statistics by Gary H. McClelland (http://psych.colorado.edu/~mcclella/java/zcalc.html)
Probability and Quantile Applets The JAVA applets that calculate areas under the standard normal density curves and quantiles of the normal distribution. (http://www-stat.stanford.edu/~naras/jsm/FindProbability.html)
SticiGui Statistics Tools for Internet and Classroom Instruction with a Graphical User Interface by Philip B. Stark, Department of Statistics, University of California, Berkeley (http://www.stat.berkeley.edu/users/stark/SticiGui/index.htm)
StatPages.net ... links to online statistics books, tutorials, downloadable software, and related resources. (http://StatPages.net)