20 randomly selected statistics students were given 15 multiple-choice questions and 15 open-ended questions - all on the same material. The professor was interested in determining which type of questions the students scored higher. This experiment is an example of
A) a one sample test of means.
B) a two sample test of means.
C) a paired t-test.
D) a test of proportions.

Question

Quizplus · Accepted Answer

A paired t-test would be appropriate in this case as the same sample of students were given both types of questions and therefore there is a natural pairing between the two sets of scores. The other options would not account for the paired nature of the data.

20 Randomly Selected Statistics Students Were Given 15 Multiple-Choice Questions