Question

determine if the situations below are biased or unbiased and explain why.

1. a teacher asks the first five students that walk into her room if they prefer getting to class early or late. she concludes that all her students prefer to get to class early.
2. at a convention, each attendee is given a number. a number is randomly selected in a drawing, and the person with that number wins a laptop.
3. two people from each 8th period class are asked what they think the theme of the next dance should use.
4. the newspaper staff surveyed a group of students at a band concert about what their favorite elective is.

Explanation:

1.

The sample (first five students) is not random or representative of all students (e.g., early arrivers are over - sampled), so the conclusion is biased.

2.

Each attendee has an equal chance (random number drawing) to be selected, so the selection process is unbiased.

3.

Selecting two people from each 8th period class can be a systematic and representative way (if classes are diverse), so it's unbiased.

4.

Answer:

Biased