A researcher wants to explore the degree to which political party identification in the US varies by education level. She surveys a representative sample of 1000 US citizens and asks them to identify their party identification (Democrat, Republican, or Independent) and whether or not they have a college degree (1 if yes, 2 if no). a) What types of variables is she comparing? b) What is the null hypothesis? c) Describe one alternative hypothesis the researcher might explore. d) She observes that 550 Democrats have a college eduction in her sample, while only 400 Republicans report having a college degree. How should she interpret these results? e) What type of hypothesis test should she use to determine whether or not the difference between education level of Republicans and Democrats in her sample are meaningful