Biased or Unbiased

Claire wants to know if the people in her neighborhood think that the speed limit on their street should be reduced. She asks the parents of the children she babysits.

• Biased

• Unbaised

A boss wants to know if his employees would be interested in a company picnic. He prints an alphabetical list of all the employee names and asks every 10th person on the list.

• Biased

• Unbiased

A reporter wants to know how many people in a town are interested in rock climbing. She goes to a grocery store and asks every 10th person who exits.

• Biased

• Unbiased

A magazine editor wants to know what percent of people ski. She chooses people randomly on a winter weekend and calls them at home to ask them.

• Biased

• Unbiased

At a soccer game, people sitting in the first 15 rows are surveyed about raising all ticket prices by $2 to make improvements to the stadium.

• Biased

• Unbiased

A principal wants to know if students at a particular high school are in favor of a new dress code at their school. The principal is not able to ask the opinion of every student at the school, so she needs to select an appropriate sample of the students to represent the high school.

Which sample of students should the principal choose?

• Students sitting at randomly selected tables in the library

• Students randomly selected from a list of all students at the school

• Students she selected from the hallway between classes

• Students selected by teachers