Histogram This program allows you to see how changing the number or width of categories influences the shape of a histogram. An interesting program based on lets make a deal which illustrates the basic idea of probability. A demonstration of the central limit therom in action. Confidence Intervals Allows you to see how changing an alpha level influences the width of confidence intervals.
Hypothesis test Demonstrates the power of simple hypothesis testing.
Regression Lines Allows you to see how the addition of one point influences a regression line. An on-line glossary of common statistics terms.