A Teacher Returns an Exam with Possible Scores Ranging from 0

Multiple Choice

A teacher returns an exam with possible scores ranging from 0 to 100. The students suspect that the majority of them performed poorly on the exam and request summary statistics. The teacher provides the mean, which was 72, as a summary statistic. A total of 400 students took the exam. Some of the students find the mean to be high, based on talking to other students. They take a random sample of 15 students, and they find that the mean equals 71.5 while the median equals 62. Based on this result, we conclude that:

A) there are possibly some large outliers in these data.
B) exam scores are likely right-skewed.
C) 50% of the students barely managed to pass the exam.
D) All of the answer options are correct.