When Oliver Finds Out That the Average Score on the Psychology

When Oliver finds out that the average score on the psychology test was 91 percent correct,he assumes that everyone in the class did well on the test.What is the problem with his conclusion?

A) Average scores are meaningless.
B) Every class has students that perform poorly on tests.
C) Averages can be misleading if you don't know how spread out the scores are and how they are distributed.
D) He needs to use inferential statistics to confirm that everyone in the class had a high score.

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