| APPLET | SOURCE | DESCRIPTION |
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| MeanFit | Seeing Statistics with Bolder Stats | Users drag a horizontal line on a graph that shows squared distance of points to the line and total squared error to find the position that minimizes error and verify that it is the mean. more |
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| MedianFit | Seeing Statistics with Bolder Stats | Users drag a horizontal line on a graph that shows distance of points to the line and total absolute error to find the position that minimizes error and verify that it is the median. more |
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| Mean Influence | Seeing Statistics with Bolder Stats | Users drag a data point to extreme values to observe the effect on the mean. more |
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| Median Influence | Seeing Statistics with Bolder Stats | Users drag a data point to extreme values to observe the small effect on the median. more |
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| Mean vs. Median | Seeing Statistics with Bolder Stats | Users observe samples to see whether mean or median is closer to the known "center" of the data and observe for large numbers of samples that the mean comes closer the majority of time. more |
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| Mean versus Median | Prentice-Hall applets (West) | Users observe the effect of outliers on mean and median and attempt to create distributions with specified means and medians. more |
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| Measures of Central Tendency: Mean, Median, and Mode | SABLE (Statistics Activity Based Learning Environment), Virginia Tech | Interactive tutorial to introduce measures of central tendency, activities include calculating mean and median for a small data set, finding mean and median on a histogram, answering questions regarding when each measure is useful, creating symmetric and skewed distributions by changing histograms, and observing measures on several histograms of real data. more |
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| Measures of Dispersion: Departures from Central Tendency | SABLE (Statistics Activity Based Learning Environment), Virginia Tech | Interactive tutorial to introduce variation, activities include indentifying range and percentiles from histograms, walking through standard deviation calculations, comparing histograms and descriptive for several distributions, and using interactive histograms to conceptualize z-scores. more |
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