1. ## correlation coefficients

Hi there everyone, if anyone could help me it would be appreciated.

I need to know if any of the following statements concerning the correlation coefficient are true
A) it is a unitless measure of the linear association between 2 variables
B) the range of values it can take is not restricted
C) a strong linear relationship, either positive or negative, between 2 variables indicates that 1 varaible must cause changes in the other variable
D) It is possible for a large correlation coefficient, either positive or negative, to be produced simply by chance
E) r=0 indicates there is definately no linear relationship between the two variables
F) r=-1 indicates that all points on a scatter diagram could be connected by a downward sloping straight line
G) r=-0.7 indicates a stronger linear relationship between the variables than if the correlation coefficient were -0.4

I have done lots of research and think that A, E and F are true, the others I am not sure!

Thanks!

2. Originally Posted by iamterribleatmaths
Hi there everyone, if anyone could help me it would be appreciated.

I need to know if any of the following statements concerning the correlation coefficient are true
A) it is a unitless measure of the linear association between 2 variables
B) the range of values it can take is not restricted
C) a strong linear relationship, either positive or negative, between 2 variables indicates that 1 varaible must cause changes in the other variable
D) It is possible for a large correlation coefficient, either positive or negative, to be produced simply by chance
E) r=0 indicates there is definately no linear relationship between the two variables
F) r=-1 indicates that all points on a scatter diagram could be connected by a downward sloping straight line
G) r=-0.7 indicates a stronger linear relationship between the variables than if the correlation coefficient were -0.4

I have done lots of research and think that A, E and F are true, the others I am not sure!

Thanks!
A) Yes
B) No
C) Likely, not definite
D) Extremely unlikely, but possible
E) It is not possible for r to be 0
F) Yes
G Yes

-Dan