University of California, Berkeley: Philip Stark's SticiGui: "Chapter 22: Standard Error"
This is an optional reading. Read Chapter 22 to learn about standard error. Read through this chapter if you would like to experience the entire course as it was presented at University of California, Berkeley. 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.