You will see contingency tables used often to compare two categorical variables (nominal and/or ordinal). To report results, you would simply compare the differences in percentages across categories. To establish if there is a statistical relationship (remember these are samples with margins of error), you could use the chi-square test. Do you have any contingency table examples to offer?

Why would you want to control for competing hypotheses (

Can you guess why multiple regression is the answer to this, in the long run?