| APPLET | SOURCE | DESCRIPTION |
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| Horseshoes | istics.net | Uses an analogy of tossing horseshoes to illustrate how confidence intervals work, user specifies size of horseshoe/interval and simulates tosses which represents attempts to "capture" the parameter or stick, users can observe that as the size of the horseshoe/interval increases, the chances of capturing the stick/parameter increase but that for any one sample/toss, the stick/parameter may or may not be captured. more |
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| Confidence Intervals: Confidence Level, Sample Size, and Margin of Error | Wolfram Demonstrations Project | Shows how confidence intervals and margin of error change as the point estimate, sample size, and confidence level are varied. Requires download of Mathematica player and demo itself. Good for classroom demonstrations. more |
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| Confidence Intervals for a Mean | Wolfram Demonstrations Project | Generates 50 confidence intervals and shows what percentage contain the population mean as the population variance, confidence level and sample size change, changing a random seed generates a new set of 50 intervals. Requires download of Mathematica player and demo itself. Good for classroom demonstrations. more |
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| Simulating Confidence Intervals for Population Parameter | Rossman/Chance Applet Collection | Generates specified number of intervals for either a mean (using either t or z with population or sample standard deviation) or a proportion for specified confidence level, displays them visually and tallies and indicates on display how many contain the actual mean, also allows user to sort intervals. See independently authored student activity to go along with this applet at http://www.kmlhs.org/faculty/TKUEHL/statistics/Chapter_9/Activity_9_1_9_2.pdf more |
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| Simlulating t-intervals for different population shapes | Rossman/Chance Applet Collection | Generates specified number of intervals for the mean (for specified confidence level) using the t-distribution for underlying normal, exponential and uniform distributions, displays them visually and tallies and indicates on display how many contain the actual mean. more |
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| Confidence Intervals | Rice Virtual Lab in Statistics (Lane) | Generates 100 confidence intervals for the mean (both 95% and 99%) for samples of size 10, 15 or 20, displays them visually and tallies and indicates on display how many contain the actual mean. more |
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| Confidence Interval | W.H. Freeman & Co. | Generates either one or 50 80%, 90%, 95%, or 99% confidence intervals for a mean, displays them visually and tallies and indicates on display how many contain the actual mean. more |
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| Confidence Interval for Mean | VESTAC: Java Applets for Visualization of Statistical Concepts | Generates a specified number of intervals for the mean using various confidence levels and samples of different sizes from a normal population, visually displays both samples and intervals, tallies percentage of intervals that capture the mean, can also do side by side comparison of two processes, for example, using different sample sizes. more |
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