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=Under $15,000; 2=$15-30,000; 3=$30-50,000; 4=$50-75,000; 5=$75-100,000; 6=$100-150,000;
7=$150-200,000; 8=$200,000 or more.
-Use the election scatterplot to the find the critical values corresponding to a 0.01 significance level used to test the null hypothesis of $Q _ { \mathrm { s } } = 0$

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