Posted by Statistics on .
r^2
the corelation squared
measures how well the y hat is than just using y bar or the other way around...
I don't remeber what r^2 measures I have what it means on my calculator but I still don't understand it
My teacher told me it's basically somehting like how much better y hat is to predict y values than y bar or somethiing like that
can you please explain
thanks

Statistics 
bobpursley,
this is on the mark, it is not particularily easy reading. Read it carefully.
http://en.wikipedia.org/wiki/Coefficient_of_determination