Question

Joann wanted to find out if her schoolmates owned pets. She stood at the entrance of the school and asked every fifth student, "Do you own a pet?" According to the results of her survey, 55% of the students own a pet.

Why is the sample or survey biased?

A. The survey influences students to say yes.

B. The sample only included club members.

C. The sample did not include students from all grades.

D. The sample and survey are not biased.

Answer 1

C

It’s biased because it’s every 5th person and not everybody

Answer 2

D

Explanation:

The sample and survey are not biased because anyone can be chosen, and because it is every fifth student, the sample is random.