(2009年高考福建卷)一个容量为100的样本,其数据的分组与各组的频数如下:
组别 | (0,10] | (10,20] | (20,30] | (30,40] | (40,50] | (50,60] | (60,70] |
频数 | 12 | 13 | 24 | 15 | 16 | 13 | 7 |
则样本数据落在(10,40]上的频率为( )
A.0.13 B.0.39
C.0.52 D.0.64
高三数学选择题中等难度题
(2009年高考福建卷)一个容量为100的样本,其数据的分组与各组的频数如下:
组别 | (0,10] | (10,20] | (20,30] | (30,40] | (40,50] | (50,60] | (60,70] |
频数 | 12 | 13 | 24 | 15 | 16 | 13 | 7 |
则样本数据落在(10,40]上的频率为( )
A.0.13 B.0.39
C.0.52 D.0.64
高三数学选择题中等难度题查看答案及解析
组别 | (0,10] | (10,20] | (20,30) | (30,40) | (40,50] | (50,60] | (60,70] |
频数 | 12 | 13 | 24 | 15 | 16 | 13 | 7 |
高三数学选择题中等难度题查看答案及解析
组别 | (0,10] | (10,20] | (20,30) | (30,40) | (40,50] | (50,60] | (60,70] |
频数 | 12 | 13 | 24 | 15 | 16 | 13 | 7 |
高三数学选择题中等难度题查看答案及解析
组别 | (0,10] | (10,20] | (20,30) | (30,40) | (40,50] | (50,60] | (60,70] |
频数 | 12 | 13 | 24 | 15 | 16 | 13 | 7 |
高三数学选择题中等难度题查看答案及解析
组别 | 频数 |
(0,10] | 12 |
(10,20] | 13 |
(20,30] | 24 |
(30,40] | 15 |
(40,50] | 16 |
(50,60] | 13 |
(60,70] | 7 |
高三数学选择题中等难度题查看答案及解析
组别 | 频数 |
(0,10] | 12 |
(10,20] | 13 |
(20,30] | 24 |
(30,40] | 15 |
(40,50] | 16 |
(50,60] | 13 |
(60,70] | 7 |
高三数学选择题中等难度题查看答案及解析
组别 | (10,20] | (20,30] | (30,40] | (40,50] | (50,60] | (60,70] |
频数 | 2 | 3 | 4 | 5 | 4 | 2 |
高三数学选择题中等难度题查看答案及解析
一个容量为20的样本数据,分组后,组别与频数如下:
组别 | [10,20) | [20,30) | [30,40) | [40,50) | [50,60) | [60,70] |
频数 | 2 | 3 | 4 | 5 | 4 | 2 |
则样本在(20,50]上的频率为________.
高三数学填空题简单题查看答案及解析
组别 | (10,20] | (20,30] | (30,40] | (40,50] | (50,60] | (60,70] |
频数 | 2 | 3 | 4 | 5 | 4 | 2 |
高三数学选择题中等难度题查看答案及解析
组别 | (10,20] | (20,30] | (30,40] | (40,50] | (50,60] | (60,70] |
频数 | 2 | 3 | 4 | 5 | 6 | 7 |
高三数学填空题中等难度题查看答案及解析