Free Statistics Help Book
An Interactive Multimedia introductory-level statistics book.
The book features interactive demos, simulations and case studies.
Estimation :  

Confidence Intervals


1. Introduction
2. Confidence Interval for the Mean
3. t distribution
4. Confidence Interval Simulation
5. Confidence Interval for the Difference Between Means
6. Confidence Interval for Pearson’s Correlation
7. Confidence Interval for a Proportion

These sections show how to compute confidence intervals for a variety of parameters. The Confidence Interval Simulation allows you to explore various properties of confidence intervals.
Copyright 2012