Question

A teacher wanted to determine if students score higher on multiple-choice tests with four possible answers versus five possible answers. The teacher randomly assigned half of the students the exam with five choices, the other half the exam with four choices, and performed a statistical test comparing the mean scores of the two groups. The p-value for the test was 0.15. Which of the following statements is true?

(A)   The average score of one exam was 15% higher than the other exam.

(B) Fifteen percent of the students would score higher on one exam versus the other.

(C)   If there were really no difference between the two exams, there is a 15% probability that the difference observed, or one more extreme, would be due to the chance assignment of the students to the two exams.

(D)   If the experiment were repeated, there is a 15% probability that the scores on the two tests would differ.

(E)   Only 15% of students passed the exam.

Answer 1