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This is a file from the Wikimedia Commons. The description on its description page there is shown below.Commons is a freely licensed media file repository. You can help.
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Summary
Description |
The re-drawn chart comparing the various grading methods in a normal distribution. Includes: Standard deviations, cumulative percentages, percentile equivalents, Z-scores and T-scores. Inspired by Figure 4.3 on Page 74 of Ward, A. W., Murray-Ward, M. (1999). Assessment in the Classroom. Belmont, CA: Wadsworth. ISBN 0534527043 |
Source |
Originally from en.wikipedia; description page is/was here. |
Date |
2007-07-12 (first version); 2007-07-12 (last version) |
Author |
Original uploader was Heds 1 at en.wikipedia |
Permission ( Reusing this image) |
Released into the public domain (by the author).
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Discussion
Is the 1.98 sigma/z-score for 95th percentile a typo? 1.96 is nearer 95% than 1.98 which corresponds to 95.2269%...
Y axis stands not for probability, as stated, but rather for probability density. Probability itself is zero for each given point. I think this is the important point. yes this plot is wrong !
License information
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This image has been (or is hereby) released into the public domain by its author, Heds 1 at the wikipedia project. This applies worldwide.
In case this is not legally possible: Heds 1 grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
Original upload log
(All user names refer to en.wikipedia)
- 2007-07-12 14:47 Heds 1 800×600×0 (123727 bytes) A re-drawn chart comparing the various grading methods in a normal distribution. Includes: Standard deviations, cumulative percentages, percentile equivalents, Z-scores and T-scores. Inspired by Figure 4.3 on Page 74 of Ward, A. W., Murray-Ward, M. (1999)
- 2007-07-12 14:44 Heds 1 800×600×0 (137472 bytes) The re-drawn chart comparing the various grading methods in a normal distribution. Includes: Standard deviations, cumulative percentages, percentile equivalents, Z-scores and T-scores. Inspired by Figure 4.3 on Page 74 of Ward, A. W., Murray-Ward, M. (199
Licensing
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I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.
In case this is not legally possible: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
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File history
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Date/Time |
Dimensions |
User |
Comment |
current |
10:48, 23 September 2007 |
800×600 (121 KB) |
Abdull |
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File links
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