2 | 4 | 6 | 8 | |
1 | 5 | 3 | 7 |
A.25,17,8 | B.25,16,9 | C.26,16,8 | D.24,17,9 |
分组 | 频数 | 频率 | 频率/组距 |
(10,20] | 2 | 0.10 | 0.010 |
(20,30] | 3 | 0.15 | 0.015 |
(30,40] | 4 | 0.20 | 0.020 |
(40,50] | a | b | 0.025 |
(50,60] | 4 | 0.20 | 0.020 |
(60,70] | 2 | 0.10 | 0.010 |
A.19 | B.16 | C.24 | D. 36 |
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