Which of the following is NOT likely to be considered an ext

Which of the following is NOT likely to be considered an extraneous variable in a single classroom testing situation?              A) students are testing immediately following lunch and they are all sleepy
    B) an announcement from the principal came over the loud speaker during testing
       C) the room is very cold, and most students are actually shivering
      D) two students are visibly shaking, feeling anxious, and know they won’t do well on the test

Solution

Except the option (D) all other varaibles are not likely to be considered an extraneous variable in a single classroom testing situation