Professor Smith teaches two sections of Biology 101 He admin

Professor Smith teaches two sections of Biology 101. He administers the same final examination to both sections. John is enrolled in section A and Mary is enrolled in section B. John and Mary both get a score of 80 on the final. Given that in both sections the distribution of the scores is close to unimodal and symmetric, what conclusion can you draw regarding how John and Mary performed within their respective sections?

Select one:

A. The relative performance of John and Mary depends on the value of the mean for their respective sections.

B. The relative performance of John and Mary depends on the mean and the standard deviation of the scores in their respective sections.

C. The relative performance of John and Mary depends on how hard they find the exam.

D. Relative to his or her section, Mary and John did equally well on the final.

Solution

The answer is

B. The relative performance of John and Mary depends on the mean and the standard deviation of the scores in their respective sections.

To ame a comparison, we need to know the Mean and standard deviation.