This page will perform the procedure for up to k=12 sample values of r, with a minimum of k=2. It will also perform a chi-square test for the homogeneity of the k values of r, with df=k-1. The several values of r can be...

This online, interactive lesson on expected value provides examples, exercises, and applets in which students will explore relationships between the expected value of real-valued random variables and the center of the...

The applet, created by Virginia Tech's Department of Statistics, allows you see how probabilities are determined from the exponential distribution. The user determines the mean of the distribution and the limits of...

Richard Lowry of Vassar College has created a java program to generate a graphic and numerical display of the properties of the F-distributions, for any value of df_numerator and for values of df_denominator > = 5. When...

This web site presents illustrations of the Fermi surfaces of many of the elements in the periodic table. Interactive 3D illustrations, stereo-3D images, and standard jpeg images are available. Surfaces can be displayed...