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Confidence Intervals
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| | Exploring Data: Understanding Confidence Intervals
The Exploring Data Web site contains a great activity entitled "Understanding Confidence Intervals" for introducing confidence intervals, a concept that can be very difficult for students.
 Exploring Data: Understanding Confidence Intervals
The STAR Library
The STAR Library contains two activities for exploring confidence intervals: "Rectangularity" and "What is the Shelf Life?" (Follow the link that says, "Click here to view a list of all activities published in the STAR Library.")
The STAR Library
CJ Alverson's Ugly Statistics Resource Page
Alverson's site contains notes and case studies for confidence intervals in an introductory course.
CJ Alverson's Ugly Statistics Resource Page
Polling: Sampling Variation and the Margin of Error
This activity from the PBS Web site The First Measured Century can be used to explore sampling, margin of error, and sampling distributions.
Polling: Sampling Variation and the Margin of Error
New Confidence Interval Applet
Webster West's java applet helps students understand confidence intervals. For a given mean and standard deviation it allows the user to change the alpha level and then calculates and displays the proportion of intervals that capture the mean.
New Confidence Interval Applet
Confidence Intervals
This applet from the Rice Virtual Lab in Statistics helps students understand confidence intervals. Samples are drawn from a population and then confidence intervals are created from these samples. The overall proportion of 95 percent and 99 percent confidence intervals that contain the population mean is tabulated.
Confidence Intervals
Confidence Intervals for Means
This applet by Charles Stanton takes 20 samples and plots the data, the population mean, and the confidence intervals all on the same graph.
Confidence Intervals for Means
VESTAC: Java Applications for the Visualization of Statistical Concepts
This java applet from VESTAC allows the user to step through the construction of confidence intervals based on each of 100 samples. There is a nice connection between the histogram of the data and the confidence interval generated from it. Start with the Tests link and then choose Confidence Interval for Mean.
VESTAC: Java Applications for the Visualization of Statistical Concepts
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