A newspaper article about opinion polls says that "43% of Americans approve of the president's overall job performance." Toward the end of the article, you read: "The poll is based on telephone interviews with 1210 adults from around the United States."
a. What is the population of interest for the poll cited in the newspaper article?
b. What is the sample?
c. What would be the properly worded question most likely asked by the pollster in this survey?
d. What type of data (variable) was collected in this poll?