Determine the type of bias involved. A local businessman is proposing a new sports stadium in a metropolitan area. He puts up billboards all over town and buys radio ad time. A toll-free number is given, and people are urged to call this number with their opinion regarding the new stadium proposal. people call in.

Answer: This is called Self-interest bias.

Explanation:

When someone is using this type of bias they are doing it for their own self interest. They will use all information gathered to use the information that will benefit themselves and their interests. This can be considered unethical in some types of businesses. The person using self interest bias will try to blame others for any failures that they may have. They may also refuse to take personal responsibility in any situation.

These are three other types of bias;

Selection bias Information bias Confounding