A statistics professor has just given the final examination in his introductory statistics course. In particular, he is interested in learning how his class of 50 students performed on this exam. The data are shown below. 78 72 73 75 79 72 75 77 71 78 83 84 71 81 82 79 71 73 89 74 75 93 74 88 83 90 82 79 62 73 88 76 76 76 80 84 84 91 70 76 74 68 80 87 92 84 79 80 91 74