For a given set of paired data, the correlation and regression coefficients have been calculated as being equal to r, bxy and byx respectively. Now, each of the values of the x series is divided by 5. What effect does it have on each of these co-efficients?
1
The three co-efficients remain unchanged
2
There is no change in r but by x changes to byx/5 and bxy changes to 5 bxy
3
Each of the co-efficients will be reduced to one fourth of its value.
4
There is no change in r but by x changes to 5byx and bxy changes to bxy/5