Task instructions
Choose the best answer. For sentence equivalence in full practice, select two choices only when instructed.
A survey with a 10% response rate is used to represent everyone. What is the main concern?
A. Nonresponse bias
B. Arithmetic impossibility
C. No questions were asked
D. The population has no opinions
Practice workspace
Write notes or your response
02:00
Reveal answer key / expected response
A — Nonresponse bias
Suggested approach
Identify the tested relationship; eliminate choices that are grammatically or logically incompatible; verify the sentence or passage as a whole.
Official-style scoring criteria
Correct interpretation, vocabulary, and reasoning.