Tuition for illegal immigrants. As part of a project for a political science class, a student decided to conduct an online poll asking the following question: “Do you think that illegal immigrants should be allowed to pay instate tuition, even though they are not legal citizens of that state?” Possible responses were “Yes,” “No,” and “Unsure.” Of those who responded, 81% said

“No,” 19% said “Yes,” and 0% said “Unsure.” Explain why this opinion poll is almost certainly biased.