3.14 An engineering department chair is interested in comparing the effect on the student grades of a well-established postgraduate module delivered using a traditional lecture mode and new distance-learning software. Fifty students enrolled in a postgraduate course are available for this study.
a Design an experiment to compare the two teaching methods.
b Suppose it is known that some of these students are full-time students and some are part-time students. Improve upon your design in part

(a) to take into account the difference in part-time and full-time student achievements.
c Suppose the department chair decided to let students choose between classes with the two different modes of instruction (traditional or distance-learning). Discuss the consequences of his decision to let students choose the class.