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

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

Date/TimeThumbnailDimensionsUserComment
current10:48, 23 September 2007Thumbnail for version as of 10:48, 23 September 2007800 × 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, )
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This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
Width 800
Height 600
Retrieved from "http://en.wikipedia.org/wiki/File:The_Normal_Distribution.svg"
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