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=$15-29,999; 3=$30-44,999; 4= $45-59,999; 5=$60-74,999; 6=$75-89,000, 7=$90-104,999; 8=$105,000 or more.
Use the election scatterplot to determine whether there is a correlation between percentage of vote and income level at the 0.01 significance level with a null hypothesis of ρS= 0.
