l. 3} Arrange the numbers: [7, 45. 38, 27, 6, 43, ll, 57, 34 and 22 in an array. 1)) Determine the difference between the highest and the least observation. 2. The nal grades in mathematics of 80 students in a state university examination are recorded in the accompanying table. 68 84 75 82 68 90 62 88 76 93 73 79 88 73 60 93 71 59 85 75 6] 65 75 87 74 62 95 78 63 72 66 78 82 75 94 77 69 74 68 60 96 78 89 61 75 95 60 79 83 71 79 62 67 97 78 85 76 65 7| 75 65 80 73 57 88 78 62 76 53 74 86 67 73 8] 72 63 76 75 85 77 (a) From the above, nd the highest grade, the least grade and the difference betWeen the highest and the least grade. {b} Find the grades ofthe (i) Five highest ranking students. (ii) Five IOWBSI ranking students. (iii) The student ranking l0th highest. (iv) Number ot'students who received grades of 75 or higher. (v) Number of students who received grades below 85. (vi) Percentage of students who received grades higher than 65 but not higher than 85. (c) Prepare the frequency distrJution table, using the class interval of 50 54. 55 59. 60 64. and soon. {d} Determine the mean for the data that you have grouped in [e]