Useful web sites for Statistics I and II, Elementary Statistics and Probability and Statistics I and II (note: most of these links came directly from Robin Lock's page (St. Lawrence University). I have included a link to his page because there are many other fantastic links available, but I have included many of my favorites right here.)
Histogram - check the effect of class width on Old Faithful data (Webster West - S. Carolina)
Calculating normal probabilities - just click or slide the boundaries to find the probability of the shaded region
Accurate Normal Calculator - enter the endpoints of the region numerically. (Two preceding applets are demos from Gary McClelland's Seeing Statistics project.
Drawing a Regression Line by "Eye" (Note: Netscape 4.06 or better (contains Java 1.1) to do this) Click the "Begin" box to bring up a scatterplot. Use your mouse to draw a line on the scatterplot. The MSE error is computed (i.e. "average" squared error). Check the minimum MSE and see how close you can get. Click the box to see the least squares line. You can also guess and check the correlation. This applet is part of the Rice Virtual Lab in Statistics.
Influence
in Regression - see the effects of adding an outlier to a least
squares
line. (Webster West - S. Carolina)
Simulation
Applet at Illinois Champaign-Urbana (used for examining
sampling distributions, confidence intervals, and other concepts)
Confidence Interval Simulator - (Rice Virtual lab in Statistics). (Note: Netscape 4.06 or better is required for Java 1.1)
CUWU Statistics Web Site (Contains applet for simulating sampling distributions and alternate link to Guessing Correlations game)
Rice Virtual Lab in Statistics (Contains a huge variety of applets, including two used above)
Vestac Java Applets for Visualization of Statistical Concepts (contains many simulation applets)