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The respondents to the Montana poll described in Exercise 29 in Chapter 26 were also classified by income level: low (under $20,000), middle ($20,000 $35,000), or high (over $35,000).
Is there any evidence that party enrollment there is associated with income? Test an appropriate hypothesis about this table, and state your conclusions.
|
|
Democrat
|
Republican
|
Independent
|
|
Low
|
30
|
16
|
12
|
|
Middle
|
28
|
24
|
22
|
|
High
|
26
|
38
|
6
|