Exploring Confidence Intervals
The red bar shows a confidence interval with x-bar equal to 756. Use the top slider to change the confidence level. Use the left slider to change sigma, the population standard deviation, and use the right slider to change the sample size, n. The blue curve is the sampling distribution of x-bar, and its standard error is sigma divided by the square root of n.
Return to the index of applets
The applet(s) on this page is from Seeing Statistics,™ an online, interactive statistics textbook. Seeing Statistics is a registered service mark used herein under license. The applet(s) on this page was designed to be used exclusively with Introduction to Probability and Statistics, Eleventh Edition, by Mendenhall, Beaver, & Beaver. (c) 2003, Duxbury Thomson Learning. The applet(s) on this page may not be copied, duplicated, or reproduced for any reason.