A Data Set Consists of 20 Pairs of Observations $\left( x _ { 1 } , y _ { 1 } \right) , \left( x _ { 2 } , y _ { 2 } \right) , \ldots \ldots \left( x _ { 20 } , y _ { 20 } \right)$

Multiple Choice

A data set consists of 20 pairs of observations $\left( x _ { 1 } , y _ { 1 } \right) , \left( x _ { 2 } , y _ { 2 } \right) , \ldots \ldots \left( x _ { 20 } , y _ { 20 } \right)$ If each $x _ { i }$ is replaced by $x _ { i } - 1$ and if each $y _ { i }$ is replaced by $y _ { i } - 2$ then the sample correlation coefficient r

A) decreases by .05
B) decreases by .10
C) increases by.05
D) increases by .10
E) remains unchanged