File:The Normal Distribution.svg

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

Contents

[edit] 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 Note: The 95% range is labelled as -1.98 to +1.98 standard deviations. This is probably a typographic error, as the correct range is plus or minus 1.96 standard deviations.
Date 2007-07-12 (first version); 2007-07-12 (last version)
Source Originally from en.wikipedia; description page is/was here.
Author Original uploader was Heds 1 at en.wikipedia
Permission
(Reusing this file)

Released into the public domain (by the author).

[edit] Discussion

What is the z-score which has the steepest points of the curve? My guess it is z = -1, +1. The way to tell is to differentiate the pdf and find its maxima, but not sure if I'm up to that...

[edit] Licensing

PD-icon.svg This work has been 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.

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[edit] 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 == Licensing == {{PD-self}} [[Category:Normal distribution]] {{subst:Unc}} {{subst:Unc}} {{subst:Unc}}

File history

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Date/TimeThumbnailDimensionsUserComment
current10:48, 23 September 2007Thumbnail for version as of 10:48, 23 September 2007800 × 600 (121 KB)Abdull (talk | contribs){{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,

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Width 800
Height 600
Retrieved from "http://commons.wikimedia.org/w/index.php?title=File:The_Normal_Distribution.svg&oldid=53156555"
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