The Following Scatterplot Shows the Percentage of the Vote a Candidate

Multiple Choice

The following scatterplot shows the percentage of the vote a candidate received in the 2004 senatorial elections according to the voter's income level based on an exit poll of voters
Conducted by CNN. The income levels 1 -8 correspond to the following income classes: Use the election scatterplot to the find the critical values corresponding to a $0.01$ significance level used to test the null hypothesis of $\rho _ { z } = 0$ .

A) $- 0.881$ and $0.881$
B) $- 0.881$
C) $- 0.738$ and $0.738$
D) $0.881$