已知50个数据的分组以及各组的频数如下:
|
153.5~155.5 |
2 |
161.5~163.5 |
10 |
|
|
155.5~157.5 |
7 |
163.5~165.5 |
6 |
|
|
157.5~159.5 |
9 |
165.5~167.5 |
4 |
|
|
159.5~161.5 |
11 |
167.5~169.5 |
1 |
(1)列出频率分布表;
(2)列出累积频率分布表;
(3)画出频率分布直方图和频率分布折线图;
(4)画出累积频率分布图.