在 中,角 所对的边分别为 ,且满足________.
得到如下频率分布表
分组 |
频数 |
频率 |
[ 1.5,4.5] |
22 |
0.22 |
[ 4.5,7.5] |
31 |
0.31 |
[ 7.5,10.5] |
x |
0.16 |
[ 10.5,13.5] |
10 |
0.10 |
[ 13.5,16.5] |
y |
z |
[ 16.5,19.5] |
5 |
0.05 |
[ 19.5,22.5] |
5 |
0.05 |
[ 22.5,25.5] |
3 |
0.03 |
[ 25.5,28.5] |
2 |
0.02 |
合计 |
100 |
1. |