The Voice of the People poll asks a random sample of citizens from different countries around the world their opinion about global issues. Included in the list of questions is whether they feel that globalization helps their country. The reported results were combined by regions. In the most recent poll, 74% of Africans felt globalization helps their country, whereas 38% of North Americans believe it helps their country.
(a) Identify the samples and the populations.

(b) Are these percentages sample statistics or population parameters? Explain your answer.