A professor gives the same test twice. Most of those who failed it the first time get scores close to the class average the second time. Most of those who did very well the first time also get scores close to average the second time. Therefore the test has

Question

Quizplus · Accepted Answer

The results suggest that the test has low reliability because the scores of the same students vary significantly between the two tests. The fact that students who did poorly the first time came closer to the class average the second time and vice versa suggests that there may be measurement error or other factors that are affecting the results. Validity cannot be determined based on the given information.

A Professor Gives the Same Test Twice