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A Dataset that is 44% Outliers
This article describes a dataset of days in office of US Presidents with outliers that are not mistakes or unusually high or low observations. The data illustrate that outliers need not be errors but could be particularly interesting cases and that data displays may differ in their ability to reveal interesting data structure. Key Words: Inliers; Interpretation in context.




http://www.amstat.org/publications/jse/v13n1/datasets.hayden...



Virtual Manipulative: Box Plot
This is a Java Applet, which allows you to load your personal data and edit data. It provides interval and endpoint values and the option to view as a histogram.




http://nlvm.usu.edu/en/nav/frames_asid_200_g_4_t_5.html?open...



Statistics at Square One: Statements of Probability and Confidence Intervals
This section of an online textbook discusses, through examples, making statements about the probability of an occurence based on standard deviation. It additionally explores using confidence intervals to relate a sample to its corresponding population. Exercises are provided as well as answers.




http://bmj.bmjjournals.com/collections/statsbk/4.shtml



Statistics at Square One: Mean and Standard Deviation
This site discusses the standard deviation of grouped and ungrouped data, data transformation, and the standard deviation between and within subjects. Exercises are provided as well as the answers.




http://bmj.bmjjournals.com/collections/statsbk/2.shtml



Star Library: What Makes the Standard Deviation Larger or Smaller?
The activity is designed to help students develop a better intuitive understanding of what is meant by variability in statistics. Emphasis is placed on the standard deviation as a measure of variability. As they learn about the standard deviation, many students focus on the variability of bar heights in a histogram when asked to compare the variability of two distributions. For these students,...




http://www.causeweb.org/repository/StarLibrary/activities/de...

