During halftime of a college football game, the university president has the announcer ask fans to go to section 429 if they are interested in filling out a survey about the cleaniness of restrooms at the stadium. On a scale from 1 (disgusting) to 10 (spotless), the mean rating was 2.2. Explain why this sampling method is biased. Do you think the mean rating for all fans would be greater than or less than 2.2? Explain your reasoning. Less than. Fans who are concerned with how disgusting the restrooms are the only ones who would have voluntarily participated in this survey, leading to an overestimate. Greater than. Fans who are concerned with how disgusting the restrooms are the only ones who would have voluntarily participated in this survey, leading to an underestimate