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This applet generates dotplots for different data sets and allows users to guess the location of various measures of center and spread. Clicking "Resample” produces a dotplot of random data generated by the applet. A dotplot of user-input data can be generated by clicking “Edit Data” and typing or copy and pasting the data in the textbox. To guess the mean, median, standard deviation, and interquartile range (IQR) users check the “Guess Mean/Median”, “Guess Deviation”, or “Guess IQR” box and slide the relevant marker along the horizontal axis. When “Guess Deviation” is selected, users can also select “Show Percentages” to display the percentage of data points within the user’s current guess for standard deviation. Clicking “Show Actual” displays the actual position of the selected measure on the dotplot. Clicking on an individual data point shows its value. Users can edit the data under “Edit Data” or by clicking and dragging the data points on the graph.
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Resource Type
Email Address,
Date Of Record Creation 2006-07-31 13:49:07
Date Of Record Release 2005-06-20 13:27:33
Date Last Modified 2007-07-24 18:32:57
Statistical Topic
Material Type
Author Name Allan Rossman, Beth Chance
Author Organization California Polytechnic State University
Technical Requirements Java Applet
Comments This applet is useful for introducing and generating dotplots, however, the lack of instructions on the website requires extra work from instructors to implement the applet effectively.
Source Code Available
Intended User Role
Cost involved with use
Math Level

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