A local newspaper wants to gauge public opinion on a proposed city budget increase. They conduct an online poll on their website, asking visitors to vote 'Yes' or 'No' on the increase. After one week, 2,500 votes are cast, with 70% voting 'No'. Which of the following is true about the newspaper's poll?
It provides a reliable measure of public opinion because a large number of votes were collected.
The poll is biased because it only reaches people who visit the newspaper's website and choose to participate.
The results are valid only if the newspaper's website is visited by a diverse group of people.
To be unbiased, the poll should have been conducted in person at various locations throughout the city.
