The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » Courses » ap-stat

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: [ap-stat] explaining r^2
Replies: 1   Last Post: Nov 1, 2011 2:26 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Kerry Ratigan

Posts: 8
Registered: 11/1/11
re:[ap-stat] explaining r^2
Posted: Nov 1, 2011 2:26 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

I'm also new to AP Stats and I'd like to add on to this question...

If someone says:

According to the model, an R-squared of .86 means that 86% of the variation in y can be accounted for by x.

Is that OK? The language in my textbook and the AP review books seems inconsistent on the best way to phrase this and I wouldn't want my students to get penalized on the exam.

Also, does anyone have any examples with data that illustrate an extremely high R-squared (like 99%), but nonlinear data? Or a very low R-squared (like 10%), but a useful model? We discussed this issue in class and one of my students was skeptical that these situations could occur with real data.

Thank you!

Teda International School
Tianjin, China
Frequently asked questions(FAQ)
List Archives from 1994:
To search the list archives for previous posts go to
To unsubscribe click here:
To change your subscription address or other settings click here:

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.