Which of the following samples would represent a biased sample if a population comprised 40% freshmen,20% sophomores,20% juniors,and 20% seniors?
A) 200 of each class year (a total sample of 800 students)
B) 80 freshmen, 40 sophomores, 40 juniors, 40 seniors
C) 40 freshmen, 20 sophomores, 20 juniors, 20 seniors
D) 8 freshmen, 4 sophomores, 4 juniors, 4 seniors

Question

Quizplus · Accepted Answer

Option A is biased because it does not reflect the original population proportions; it treats each class year as equal, ignoring the original distribution.

Which of the Following Samples Would Represent a Biased Sample