2. The following scores were obtained by a sample of 10 mathematics students on separate calculus and statistics exams. StudentNo. 1 2 3 4 5 6 7 8 9 10 Calculus 53 61 70 42 93 63 73 92 23 45 Statistics 46 56 73 35 85 69 72 96 21 50 Test the hypothesis that there is no essential difference between a student's performance on these calculus and statistics exams. State clearly any as sumptions that you make