# Stats - College level

• Jun 12th 2008, 07:42 PM
LeftBrainer
Stats - College level
I figured out how to calculate a. b. and c. however, I don't know how to interpret the coefficient of determination(the second part of c). Can anyone help? Thanks in advance.
• Jun 12th 2008, 08:19 PM
tukeywilliams
Quote:

Originally Posted by LeftBrainer
I figured out how to calculate a. b. and c. however, I don't know how to interpret the coefficient of determination(the second part of c). Can anyone help? Thanks in advance.

$r^2$ gives the variation of $Y$ explained by the linear regression model. So in 1c, $7 \%$ of the variation in the net worth is explained by the linear regression model. Similarly, in 2c, $57.76 \%$ of the variation in the salary is explained by the linear regression model.
• Jun 12th 2008, 08:44 PM
tukeywilliams
are you supposed to be getting help on this quiz?
• Jun 12th 2008, 08:55 PM
LeftBrainer
Thanks, this is exactly what I needed to know: http://www.mathhelpforum.com/math-he...420ecd46-1.gif gives the variation of http://www.mathhelpforum.com/math-he...d003a3e0-1.gif explained by the linear regression model. Something close to this was in my notes but I couldn't get my brain around it.