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: Under ; 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
A) The test statistic is between the critical values, so we fail to reject the null hypothesis . There is no evidence to support a claim of correlation between percentage of vote and income level.
B) The test statistic is between the critical values, so we reject the null hypothesis . There is sufficient evidence to support a claim of correlation between percentage of vote and income level.
C) The test statistic is not between the critical values, so we fail to reject the null hypothesis . There is no evidence to support a claim of correlation between percentage of vote and income level.
D) The test statistic is not between the critical values, so we reject the null hypothesis . There is sufficient evidence to support a claim of correlation between percentage of vote and income level.
Correct Answer:
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