A campaign conducts a poll of 1500 registered voters, and finds that 54% intend to vote for candidate A, 32% intend to vote for candidate B (their candidate), and 14% are undecided. Undecided voters, and those intending to support candidate A, are asked what single issue might cause them to support candidate B. The topic of candidate B's stump speech is selected to focus on the issue cited most frequently.

I. What is the population?

II. What is the sample?

III. Is the study observational or experimental? Justify your answer.

IV. If observational, identify ALL variables. If experimental, identify ALL independent and dependent variables.

V. For each of the variables identified in part IV, list which of the four levels/scales of measurement was used to obtain data on these variables?

VI. Classify each of the variables identified in part IV as either attribute or numerical