module 9 score transformations and t heir effects
Download
Skip this Video
Download Presentation
Module 9 Score Transformations and T heir Effects

Loading in 2 Seconds...

play fullscreen
1 / 5

Module 9 Score Transformations and T heir Effects - PowerPoint PPT Presentation


  • 58 Views
  • Uploaded on

Module 9 Score Transformations and T heir Effects. Why transform? Effects on Central Tendency Effects on Dispersion Commonly transformed scores. Why do it?. To curve grades! Higher or lower When they are less or more spread out than origionaly.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Module 9 Score Transformations and T heir Effects' - cormac


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
module 9 score transformations and t heir effects
Module 9 Score Transformations and Their Effects
  • Why transform?
  • Effects on Central Tendency
  • Effects on Dispersion
  • Commonly transformed scores
why do it
Why do it?
  • To curve grades! Higher or lower
  • When they are less or more spread out than origionaly
effect of transformations on mean central tendency
Effect of Transformations on MeanCentral Tendency
  • Transformations – applying the same adjustment to all scores in a data set
  • Effects on the mean
    • Adding or subtracting a constant to all scores will increase or decrease the mean by that constant
    • Multiplying or dividing all scores by a constant will cause the mean to be multiplied or divided by that score
effect of transformations on dispersion
Effect of Transformations on Dispersion
  • Effects on Dispersion
    • Adding or subtracting a constant to all scores will not effect measures of dispersion
    • Multiplying or dividing all scores by a constant will cause measures of dispersion to be multiplied or divided by that score
ad