What are Standard Scores?

1 / 9

# What are Standard Scores? - PowerPoint PPT Presentation

What are Standard Scores?. Standard scores provide a means to combine multiple scores with unlike scales?. Standard Scores . Two examples of standard scores: Z scores T scores. Variable. A variable is a measureable characteristic determined and defined by an experimenter. Z scores.

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

## PowerPoint Slideshow about 'What are Standard Scores?' - elda

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

### What are Standard Scores?

Standard Scores
• Two examples of standard scores:
• Z scores
• T scores
Variable
• A variable is a measureable characteristic determined and defined by an experimenter
Z scores
• Z scores represent standard deviation units on the normal curve
Z score formulation
• High score is a good score

Z= X-X

s

Low score is a good score

Z= X-X

s

T score formulation
• High Score is a good score

T = 10 (X-X)

s

• Low score is a good score

T = 10 (X-X)

s

Z scores and T scores represented on the normal curve

Z score units

-3 -2 -1 0 1 2 3

T score units

20 30 40 50 60 70 80

Benefits of Z scores and T scores
• Z scores and T scores are continuous scores and therefore can be added, subtracted, multiplied, and divided
• These scores provide a means for combining scores that have unlike terms.