Image:The Normal Distribution.svg

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The_Normal_Distribution.svg‎ (SVG file, nominally 800 × 600 pixels, file size: 121 KB)

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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).


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

Public domain 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

Public domain
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

Click on a date/time to view the file as it appeared at that time.

Date/Time Dimensions User Comment
current 10:48, 23 September 2007 800×600 (121 KB) Abdull ({{Information |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, )
The following pages on Schools Wikipedia link to this image (list may be incomplete):
The 2008 Wikipedia for Schools is sponsored by SOS Children , and is a hand-chosen selection of article versions from the English Wikipedia edited only by deletion (see www.wikipedia.org for details of authors and sources). See also our Disclaimer.