Homework Help: Mth plz...help

Posted by Ashlee on Sunday, September 21, 2008 at 11:12am.

A linear regression equation of best fit between a student's attendence and the degree of sucess in school is h = 0.5x + 68.5. the correlation coefficent, r, for these data would be
(1) 0 < r < 1
(2) -1< r < 0
(3) r = 0
(4) r = -1

Mth plz...help - David Q, Sunday, September 21, 2008 at 11:52am
You've got a positive relationship (perhaps not surprisingly) between attendance and success, which you can see from the sign of the coefficient on the X term (+0.5). That means the correlation coefficient (which can only lie between -1 and +1) is positive. Only one of the four possible answers describes that situation.
Mth plz...help - ashlee, Sunday, September 21, 2008 at 1:06pm
is the answer no. 1?
Mth plz...help - David Q, Sunday, September 21, 2008 at 1:27pm
Yes, it is.
- Mth plz...help - Anonymous, Sunday, September 21, 2008 at 2:54pm
  thanks
Mth plz...help - Anonymous, Wednesday, September 26, 2012 at 9:56pm
3

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