A testing agency is trying to determine if people are cheating on a test. The tests are usually administered in a large room without anyone present. They are now posting test administrators in all testing areas to record the number of cheaters.
Which of the following statements is correct?
A.
This method of sampling can be considered both biased and unbiased.
B.
This method of sampling is biased.
C.
This method of sampling is neither biased nor unbiased.
D.
This method of sampling is unbiased.