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:
$$1 = \text { Under } \$ 15,000 ; 2 = \$ 15 - 30,000 ; 3 = \$ 30 - 50,000 ; 4 = \$ 50 - 75,000 ; 5 = \$ 75 - 100,000 \text {; }$$
$$6 = \$ 100 - 150,000 ; 7 = \$ 150 - 200,000 ; 8 = \$ 200,000 \text { or more. }$$


Use the election scatterplot to the find the critical values corresponding to a $0.01$ significance level used to test thi hypothesis of $p _ { s } = 0$ .

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