An exam contains only a representative sample of all the possible questions for the course. A student's knowledge of the material of the course is inferred on the basis of the student's performance on that representative sample of questions. Suppose a student gets a copy of an exam before exam day and studies the material represented by just those questions. As a result the student scores a perfect 100%. Later the student argues (perhaps to himself) that he did pass the test, and it thereby proves that he knows the material of the course. Which of the following explains the problem with the student's claim? Group of answer choices for that student the ratio of the attribute class and the reference class has defaulted to attribute/attribute, and no longer represents attribute/reference the attribute class of questions called the test refers to the possible questions on all tests the reference class of questions does not contain any questions from the course material and for that reason the student's score is not representative of the course