Wolfram Demonstrations Project
Use the information provided on the demonstration pages and interact with the various simulations.
If you have not done so already, you will need to download install the free Wolfram CDF Player™. If using Chrome as your browser, you will also need to download the CDF files from the pages linked to above, and run them through the CDF Player on your desktop. Other browsers will allow you to interact with the demonstrations directly on the webpage.
View the following projects:
"Sampling Distribution of the Sample Mean" by Jim R Larkin
"Distribution of Normal Means with Different Sample Sizes" by David Gurney
"Central Limit Theorem for the Continuous Uniform Distribution" by David K. Watson
These resources are copyrighted by the Wolfram Demonstrations Project and may not be reproduced without the explicit permission of the copyright holder.