频率分布表
分组 |
频数 |
百分比 |
144.5~149.5 |
2 |
4% |
149.5~154.5 |
3 |
6% |
154.5~159.5 |
a |
16% |
159.5~164.5 |
17 |
34% |
164.5~169.5 |
b |
n% |
169.5~174.5 |
5 |
10% |
174.5~179.5 |
3 |
6% |