
请注意分组时按照下列标准:
| 等级 | A | A- | B+ | B | B- | C+ | C | C- | D+ | D | F |
| 分数 | 90-100 | 86- | 83-85 | 80-82 | 76-79 | 73-75 | 70-72 | 66-69 | 63-65 | 60-62 | 0-59 |
| 学生 | 成绩 | 学生 | 成绩 | 学生 | 成绩 | 学生 | 成绩 | 学生 | 成绩 |
| 1 | 86 | 28 | 34 | 55 | 88 | 82 | 70 | 109 | 71 |
| 2 | 60 | 29 | 65 | 56 | 93 | 83 | 88 | 110 | 80 |
| 3 | 65 | 30 | 30 | 57 | 85 | 84 | 88 | 111 | 87 |
| 4 | 28 | 31 | 78 | 58 | 83 | 85 | 68 | 112 | 66 |
| 5 | 85 | 32 | 86 | 59 | 93 | 86 | 87 | 113 | 84 |
| 6 | 87 | 33 | 84 | 60 | 95 | 87 | 88 | 114 | 83 |
| 7 | 70 | 34 | 87 | 61 | 71 | 88 | 91 | 115 | 85 |
| 8 | 35 | 85 | 62 | 90 | 76 | 116 | 78 | ||
| 9 | 51 | 36 | 93 | 63 | 86 | 90 | 87 | 117 | 81 |
| 10 | 58 | 37 | 96 | 91 | 81 | 118 | 81 | ||
| 11 | 90 | 38 | 82 | 65 | 92 | 61 | 119 | 71 | |
| 12 | 50 | 39 | 78 | 66 | 83 | 93 | 72 | 120 | 86 |
| 13 | 87 | 40 | 80 | 67 | 84 | 94 | 86 | 121 | 91 |
| 14 | 82 | 41 | 74 | 68 | 44 | 95 | 29 | 122 | 66 |
| 15 | 65 | 42 | 72 | 69 | 68 | 96 | 37 | 123 | 58 |
| 16 | 68 | 43 | 73 | 70 | 97 | 82 | 124 | 68 | |
| 17 | 86 | 44 | 86 | 71 | 84 | 98 | 82 | 125 | 80 |
| 18 | 80 | 45 | 85 | 72 | 86 | 99 | 82 | 126 | 77 |
| 19 | 81 | 46 | 90 | 73 | 79 | 100 | 85 | 127 | 55 |
| 20 | 70 | 47 | 69 | 74 | 78 | 101 | 78 | 128 | 54 |
| 21 | 80 | 48 | 86 | 75 | 87 | 102 | 80 | 129 | 62 |
| 22 | 49 | 49 | 86 | 76 | 88 | 103 | 90 | 130 | 54 |
| 23 | 80 | 50 | 84 | 77 | 82 | 104 | 82 | 131 | 65 |
| 24 | 70 | 51 | 81 | 78 | 83 | 105 | 72 | 132 | 74 |
| 25 | 59 | 52 | 90 | 79 | 92 | 106 | 86 | 133 | 70 |
| 26 | 80 | 53 | 34 | 80 | 86 | 107 | 80 | 134 | 72 |
| 27 | 52 | 54 | 84 | 81 | 86 | 108 | 82 | 135 | 73 |
步骤:排序:Data——Sort Cases——Sort by 成绩(Ascending)
分组:Transform——Recode into different variables——成绩——out put——成绩分组——1为90-00,2为86—,3为83-85……以此类推。详见作业1.sav 。
(2)频数分布表如下图
步骤:Analyze——Descriptive Statistics——Frequencies——成绩分组
(3)频数分布图如下:
步骤:Analyze——Descriptive Statistics——Frequencies——成绩分组——Charts——Histograms(With normal curve)。
