|Arthur Bakker (The Netherlands)||A.Bakker@fi.uu.nl|
The three demonstrated statistical minitools are Java applets that can
run via the Internet (e.g. www.fi.uu.nl/wisweb/en),
but are also available as stand-alone applications. They have been designed
for teaching experiments in grade 7 and 8 for Cobb, McClain and Gravemeijer
of the Vanderbilt University (USA), and are now used for Dutch experiments
of Bakker in grade 7 and 8.
In minitool 1 every measurement is displayed as a bar. The data can be sorted and investigated with several tools. While working on problems with the simple bar representations, the students learn to relate characteristics of the graphs to the meaning within the context of the problem. If this relationship is consolidated, a more advanced representation is used: not bars but dots in a stacked dot plot are used, the representation of minitool 2. The data in minitool 2 can be organized in several ways, e.g. make your own groups, fixed interval width, two and four equal groups. The last three are useful precursors to histogram, median and box plot. Later, the students can go on with minitool 3, which offers a multi-dimensional scatter plot with several grouping options.
Back to top
ICOTS-6, The Sixth International Conference on Teaching Statistics - International Program Committee (IPC) Website.
Copyright © 2001 by the IASE. All rights reserved. This information is subject to change without notice. This page was last modified on July 2, 2002.
For questions or comments, contact the Webmaster, Dagan Ben-Zvi.