University of California, Berkeley: Philip Stark's SticiGui: "Chapter 26: Confidence Intervals"
Read Chapter 26 to learn how to compute confidence intervals for the real population mean with the use of the "t-table” with probabilities. There are several exercises and Java applets embedded in the text that are meant to further reinforce your learning. Do not skip these exercises! For instructions on how to navigate these exercises, see "Special Instructions on SticiGui Exercises and Java Applets” in the "Course Information” section above.