Question

identifying a representative sample
lorena took a survey of the students in her honors science class to determine how many are going to college. she found that 85% of the students plan to go to college.
can lorena make the inference that 85% of all the seniors at her school are going to college? check all that apply.
□ no, lorena’s sample was not a random sample of the entire school.
□ no, to make a valid inference, lorena would have to survey every senior.
□ no, lorena’s sample was biased because it was taken only from an honors class.
□ yes, lorena’s sample was unbiased.
□ yes, lorena’s inference would be correct.

Explanation:

A representative sample must be random and unbiased to make valid inferences about an entire population. Lorena's sample only includes students from an honors science class, which is not a random sample of all seniors, and this group is not representative of the full senior class (creating bias). Surveying every senior is not required—only a proper random, unbiased sample is needed, so that option is incorrect.

Answer:

No, Lorena's sample was not a random sample of the entire school.
No, Lorena's sample was biased because it was taken only from an honors class.