ERIC Number: ED380503
Record Type: Non-Journal
Publication Date: 1994
Reference Count: N/A
Using Trilinear Plots for NAEP State Data. Program Statistics Research. Technical Report. No. 94-6.
Understanding the distribution of achievement levels of students' performance on the National Assessment of Educational Progress (NAEP) is aided through the use of the trilinear chart. This chart is described and its use illustrated with data from the 1992 state NAEP mathematics assessment. The trilinear chart is used to portray three variables simultaneously expressed in the form of components of a total. It is drawn like an equilateral triangle, each side of which is calibrated in equal percentage divisions from 0 to 100. It is shown that one can see readily the trends in performance for different demographic groups for all of the 44 participating jurisdictions simultaneously. Fifteen displays illustrate the analyses and portray some trilinear charts. (Contains 6 references.) (Author/SLD)
Publication Type: Reports - Evaluative
Education Level: N/A
Sponsor: National Center for Education Statistics (ED), Washington, DC.
Authoring Institution: Educational Testing Service, Princeton, NJ. Program Statistics Research Project.