Department of Special Education ECNU 4.登记频数并计算 用划“正”字法。将数据列入相应的组距内,在归组时如 遇有的数据正好等于某组的组限时,可将它归入数据较大 的一组。 5.计算频数( Frequency) 全部数据登记完后,把各组次数写在频数分布表内,用“ 表 Statistics of education Department of Special Education ECNU
Department of Special Education ECNU Department of Special Education ECNU Department of Special Education ECNU Department of Special Education ECNU Statistics of Education Statistics of Education Statistics of Education Statistics of Education Statistics of Education 4. 登记频数并计算 用划“正”字法。将数据列入相应的组距内，在归组时如 遇有的数据正好等于某组的组限时，可将它归入数据较大 的一组。 5. 计算频数(Frequency) 全部数据登记完后，把各组次数写在频数分布表内，用“f” 表示
Department of Special Education ECNU 表28师大附小二年级80个学生的身高 115122124127128129131132133135 120122125127128129131132133136 120122125127128130131132134136 120123125 Rtil 27。128c130-131:132134137 21124125127128130131132134138 121124125127128130131133134138 121124126127129131132133135140 121124127127129131132133135144 Department of Special Education ECNU
Department of Special Education ECNU Department of Special Education ECNU Department of Special Education ECNU Department of Special Education ECNU Statistics of Education Statistics of Education Statistics of Education Statistics of Education Statistics of Education 表2.8 师大附小二年级80个学生的身高 115 122 124 127 128 129 131 132 133 135 120 122 125 127 128 129 131 132 133 136 120 122 125 127 128 130 131 132 134 136 120 123 125 127 128 130 131 132 134 137 121 124 125 127 128 130 131 132 134 138 121 124 125 127 128 130 131 133 134 138 121 124 126 127 129 131 132 133 135 140 121 124 127 127 129 131 132 133 135 144
Department of Special Education ECNU 表29二年级80个学生身高的频数 身高(1) 组中值(2) 频数(3) 115- 116.5 118- 119.5 121- 122.5 124- 125.5 127-Statistid285f Educat 20n 130 131.5 19 134.5 136- 139- 140.5 142- 143.5 总和 80 Department of Special Education ECNU
Department of Special Education ECNU Department of Special Education ECNU Department of Special Education ECNU Department of Special Education ECNU Statistics of Education Statistics of Education Statistics of Education Statistics of Education Statistics of Education 表2.9 二年级80个学生身高的频数 身高(1) 组中值(2) 频数(3) 115- 118- 121- 124- 127- 130- 133- 136- 139- 142- 116.5 119.5 122.5 125.5 128.5 131.5 134.5 137.5 140.5 143.5 1 3 8 10 20 19 12 4 2 1 总和 80
Department of Special Education ECNU 2332累积频数和累积百分比分布表 1区分几个概念 组中值 Mid-points 频数(绝对频数)(f (Absolute) Frequency its of education 相对频数(比率)(r Relative frequency 累积(绝对)频数(cf (Absolute)Cumulative Frequency 累积相对频数( Rel cf) Relative Cumulative frequency Department of Special Education ECNU
Department of Special Education ECNU Department of Special Education ECNU Department of Special Education ECNU Department of Special Education ECNU Statistics of Education Statistics of Education Statistics of Education Statistics of Education Statistics of Education 2.3.3.2 累积频数和累积百分比分布表 1.区分几个概念 组中值 Mid-points 频数(绝对频数)(f) (Absolute) Frequency 相对频数(比率)(rf) Relative Frequency 累积(绝对)频数(cf) (Absolute) Cumulative Frequency 累积相对频数(Rel cf) Relative Cumulative Frequency
Department of Special Education ECNU 2.累积频数和累积百分比分布表 表2.10二年级80个学生身高的频数、累积频数、累积百分比表 身高 组中值 频数相对频数累积频数累积百分比 115 116.5 0125 125 118- 1195 3 3750 5.00 122.5 8 1000 15.00 124 125.5 10 1250 22 27.50 127 128.5atisti(20 of Ec2500ation42 52.50 130- 131.5 2375 61 76.25 133- 134.5 1500 9125 136- 137.5 9242 0500 37 96.25 139 140.5 0250 79 98.75 142 143.5 0125 80 100 总和 80 Department of Special Education ECNU
Department of Special Education ECNU Department of Special Education ECNU Department of Special Education ECNU Department of Special Education ECNU Statistics of Education Statistics of Education Statistics of Education Statistics of Education Statistics of Education 2. 累积频数和累积百分比分布表 表2.10 二年级80个学生身高的频数、累积频数、累积百分比表 身高 组中值 频数 相对频数 累积频数 累积百分比 115- 118- 121- 124- 127- 130- 133- 136- 139- 142- 116.5 119.5 122.5 125.5 128.5 131.5 134.5 137.5 140.5 143.5 1 3 8 10 20 19 12 4 2 1 .0125 .3750 .1000 .1250 .2500 .2375 .1500 .0500 .0250 .0125 1 4 12 22 42 61 73 77 79 80 1.25 5.00 15.00 27.50 52.50 76.25 91.25 96.25 98.75 100 总和 80