Question

identifying bias
cheryl wants to find the number of hours seventh - graders do homework each week. there are 297 boys and girls in seventh grade. if cheryl randomly surveyed 50 girls in the entire school to find the number of hours seventh - graders do homework each week, describe why she would get a biased sample.

Explanation:

Cheryl's sample is not representative of the target population (all seventh-graders). She only surveyed girls from the entire school, excluding seventh-grade boys and including girls from other grades, which does not match the group she wants to study.

Answer:

The sample is biased because:

1. It excludes seventh-grade boys, who are part of the target population of seventh-graders.
2. It includes girls from other grades, who are not part of the seventh-grade group Cheryl is trying to study. This makes the sample unrepresentative of the population she intends to measure.