Professors regularly give two versions of an exam. The professor may also provide summary statistics for each version. Suppose the following summary is provided: Number of exams Mean Median SD Version A 53 65.4 72 16 Version B 65 66.5 17 A student who took Version A says that he should get _ an extra point because his exam was harder as evidenced by the lower mean score for Version A as shown by the mean score_ Does the student have a good argument? Pick the best answer below:
O We need to know the shape of the distribution for each version to determine if this argument is valid. O Yes. Only 53 students took exam Version while 65 students took exam Version B. O No. The average scores are relatively close when considering the spread of the distributions The difference might just e be due t0 just chance O No. The median of Version A is higher. We need to know the minimum and the maximum for each version to determine if this argument is valid. O Yes: The difference in the exam scores means that there is difference in difficulty between the versions